{"id":17936,"date":"2025-12-06T11:53:25","date_gmt":"2025-12-06T11:53:25","guid":{"rendered":"https:\/\/lite14.net\/blog\/?p=17936"},"modified":"2025-12-06T11:53:25","modified_gmt":"2025-12-06T11:53:25","slug":"mailjet-deliverability-performance","status":"publish","type":"post","link":"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/","title":{"rendered":"Mailjet deliverability performance"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Introduction\" >Introduction<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Origins_and_Founding\" >Origins and Founding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Early_Growth_and_Funding\" >Early Growth and Funding<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Product_Evolution_and_Technical_Maturation\" >Product Evolution and Technical Maturation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#International_Expansion_and_Global_Reach\" >International Expansion and Global Reach<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Acquisition_History_and_Integration_into_Larger_Ecosystem\" >Acquisition History and Integration into Larger Ecosystem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjets_Place_in_the_ESP_Ecosystem\" >Mailjet\u2019s Place in the ESP Ecosystem<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#%F0%9F%A7%B0_Dual_Focus_Developers_Marketers\" >\ud83e\uddf0 Dual Focus: Developers + Marketers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#%F0%9F%8C%8D_Regulatory_Data-Privacy_Strength_Especially_for_Europe\" >\ud83c\udf0d Regulatory &amp; Data-Privacy Strength (Especially for Europe)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#%F0%9F%8C%90_Global_Reach_Multilingual_Support\" >\ud83c\udf10 Global Reach &amp; Multilingual Support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#%F0%9F%93%A6_Integrated_Scalable_Infrastructure\" >\ud83d\udce6 Integrated &amp; Scalable Infrastructure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#%F0%9F%94%97_Part_of_a_Larger_Communications_Platform_via_Sinch\" >\ud83d\udd17 Part of a Larger Communications Platform via Sinch<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Challenges_Competition_and_Industry_Context\" >Challenges, Competition, and Industry Context<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Today_as_of_2025_Its_Position_in_the_ESP_Ecosystem\" >Mailjet Today (as of 2025) &amp; Its Position in the ESP Ecosystem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Significance_Legacy\" >Significance &amp; Legacy<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#What_%E2%80%9CDeliverability%E2%80%9D_Means_and_Why_It_Matters\" >What \u201cDeliverability\u201d Means, and Why It Matters<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Origins_and_Early_Growth_of_Mailjet\" >Origins and Early Growth of Mailjet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#From_Sending_to_Delivering_%E2%80%94_The_Shift_Toward_Deliverability_Focus\" >From Sending to Delivering \u2014 The Shift Toward Deliverability Focus<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Authentication_and_Sender_Identity\" >Authentication and Sender Identity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Infrastructure_Shared_vs_Dedicated_IP_IP_Reputation\" >Infrastructure: Shared vs Dedicated IP, IP Reputation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Deliverability_Hygiene_Content_Quality_%E2%80%94_Beyond_Infrastructure\" >Deliverability Hygiene &amp; Content Quality \u2014 Beyond Infrastructure<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#List_Hygiene_and_Spam_Protection\" >List Hygiene and Spam Protection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Content_Quality_Formatting_and_Best_Practices\" >Content Quality, Formatting, and Best Practices<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Monitoring_Feedback_and_Deliverability_Intelligence\" >Monitoring, Feedback, and Deliverability Intelligence<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Real-Time_Analytics_Performance_Tracking\" >Real-Time Analytics &amp; Performance Tracking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Pre-blocking_Spam_Prevention_Logic\" >Pre-blocking &amp; Spam Prevention Logic<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Separating_Mail_Streams_Transactional_vs_Promotional\" >Separating Mail Streams: Transactional vs Promotional<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Recent_Advances_and_2020s_Meeting_New_Challenges_ISP_Policies\" >Recent Advances and 2020s: Meeting New Challenges &amp; ISP Policies<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Compliance_with_Evolving_Industry_Standards_ISP_Requirements\" >Compliance with Evolving Industry Standards &amp; ISP Requirements<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Built-in_Email_Validation_Contact-List_Hygiene_Tools\" >Built-in Email Validation &amp; Contact-List Hygiene Tools<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Emphasis_on_Engagement_Personalization_and_Segmentation\" >Emphasis on Engagement, Personalization, and Segmentation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Strengths_Limitations_and_Feedback_from_the_Community\" >Strengths, Limitations, and Feedback from the Community<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Strengths\" >Strengths<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Limitations_Critiques\" >Limitations &amp; Critiques<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Why_This_Evolution_Matters_%E2%80%94_Broader_Context_of_Email_Deliverability\" >Why This Evolution Matters \u2014 Broader Context of Email Deliverability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Whats_Next_%E2%80%94_Deliverability_in_2025_and_Beyond_and_How_Mailjet_is_Positioning\" >What\u2019s Next \u2014 Deliverability in 2025 and Beyond, and How Mailjet is Positioning<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Lessons_Learned_%E2%80%94_What_Mailjets_Evolution_Teaches_About_Deliverability\" >Lessons Learned \u2014 What Mailjet\u2019s Evolution Teaches About Deliverability<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Understanding_Deliverability_Core_Concepts_Relevant_to_Mailjet\" >Understanding Deliverability: Core Concepts Relevant to Mailjet<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#1_What_Deliverability_Really_Means\" >1. What Deliverability Really Means<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#2_The_Inbox_Landscape_How_Email_Providers_Make_Decisions\" >2. The Inbox Landscape: How Email Providers Make Decisions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Authentication_Signals\" >Authentication Signals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Sender_Reputation\" >Sender Reputation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-43\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Engagement_Signals\" >Engagement Signals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-44\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Content_and_Patterns\" >Content and Patterns<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-45\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#3_Authentication_The_Foundation_of_Deliverability\" >3. Authentication: The Foundation of Deliverability<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-46\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#SPF_Sender_Policy_Framework\" >SPF (Sender Policy Framework)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-47\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DKIM_DomainKeys_Identified_Mail\" >DKIM (DomainKeys Identified Mail)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-48\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DMARC_Domain-based_Message_Authentication_Reporting_Conformance\" >DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-49\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Brand_Indicators_for_Message_Identification_BIMI\" >Brand Indicators for Message Identification (BIMI)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-50\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#4_Sending_Reputation_Domain_IP_and_Shared_vs_Dedicated_Infrastructure\" >4. Sending Reputation: Domain, IP, and Shared vs. Dedicated Infrastructure<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-51\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Domain_Reputation\" >Domain Reputation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-52\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#IP_Reputation\" >IP Reputation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-53\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#5_List_Quality_and_Contact_Management\" >5. List Quality and Contact Management<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-54\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Permission-Based_Sending\" >Permission-Based Sending<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-55\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Double_Opt-In\" >Double Opt-In<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-56\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Bounce_Management\" >Bounce Management<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-57\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Spam_Complaints\" >Spam Complaints<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-58\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#List_Cleaning\" >List Cleaning<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-59\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#6_Engagement_The_Heart_of_Modern_Deliverability\" >6. Engagement: The Heart of Modern Deliverability<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-60\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Positive_Engagement_Signals\" >Positive Engagement Signals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-61\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Negative_Signals\" >Negative Signals<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-62\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Personalization\" >Personalization<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-63\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Send_Frequency\" >Send Frequency<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-64\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#7_Content_Structure_Relevance_and_Anti-Spam_Considerations\" >7. Content: Structure, Relevance, and Anti-Spam Considerations<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-65\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Spam_Trigger_Words\" >Spam Trigger Words<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-66\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#HTML_Best_Practices\" >HTML Best Practices<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-67\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Text-to-Image_Ratio\" >Text-to-Image Ratio<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-68\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Clear_Unsubscribe_Mechanism\" >Clear Unsubscribe Mechanism<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-69\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#8_Sending_Practices_and_Throttling\" >8. Sending Practices and Throttling<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-70\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Consistent_Sending_Patterns\" >Consistent Sending Patterns<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-71\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Warm-Up_for_New_Domains_and_IPs\" >Warm-Up for New Domains and IPs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-72\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Segmenting_by_Engagement\" >Segmenting by Engagement<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-73\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Avoiding_Spam_Traps\" >Avoiding Spam Traps<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-74\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#9_Monitoring_Deliverability_with_Mailjet\" >9. Monitoring Deliverability with Mailjet<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-75\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Key_Metrics\" >Key Metrics<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-76\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Event_Tracking\" >Event Tracking<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-77\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Deliverability_Dashboard_for_Premium_Plans\" >Deliverability Dashboard (for Premium Plans)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-78\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#AB_Testing\" >A\/B Testing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-79\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Spam_Score_Analysis\" >Spam Score Analysis<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-80\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#10_Compliance_and_Legal_Requirements\" >10. Compliance and Legal Requirements<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-81\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#GDPR\" >GDPR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-82\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#CAN-SPAM\" >CAN-SPAM<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-83\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#CASL_Canada\" >CASL (Canada)<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-84\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Infrastructure_Architecture_for_Deliverability\" >Mailjet Infrastructure &amp; Architecture for Deliverability<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-85\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#1_Overview_of_Mailjets_Deliverability-Focused_Infrastructure\" >1. Overview of Mailjet\u2019s Deliverability-Focused Infrastructure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-86\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#2_Global_Data_Centers_and_Network_Redundancy\" >2. Global Data Centers and Network Redundancy<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-87\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Geographically_Distributed_Architecture\" >Geographically Distributed Architecture<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-88\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Load_Balancers_and_Traffic_Routing\" >Load Balancers and Traffic Routing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-89\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Failover_Capability\" >Failover Capability<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-90\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#3_High-Throughput_MTA_Mail_Transfer_Agent_Architecture\" >3. High-Throughput MTA (Mail Transfer Agent) Architecture<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-91\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Parallelized_Microservices-Driven_Processing\" >Parallelized, Microservices-Driven Processing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-92\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Optimized_SMTP_Pipelines\" >Optimized SMTP Pipelines<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-93\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#4_IP_Infrastructure_Warm-Up_and_Reputation_Segmentation\" >4. IP Infrastructure, Warm-Up, and Reputation Segmentation<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-94\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Shared_Dedicated_and_Hybrid_IP_Pools\" >Shared, Dedicated, and Hybrid IP Pools<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-95\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Automated_IP_Warm-Up\" >Automated IP Warm-Up<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-96\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Reputation_Scoring_Anomaly_Detection\" >Reputation Scoring &amp; Anomaly Detection<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-97\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#5_Email_Authentication_and_Compliance_Infrastructure\" >5. Email Authentication and Compliance Infrastructure<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-98\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#SPF_Sender_Policy_Framework-2\" >SPF (Sender Policy Framework)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-99\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DKIM_DomainKeys_Identified_Mail-2\" >DKIM (DomainKeys Identified Mail)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-100\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DMARC_Domain-based_Message_Authentication_Reporting_Conformance-2\" >DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-101\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Brand_Indicators_for_Message_Identification_BIMI-2\" >Brand Indicators for Message Identification (BIMI)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-102\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Compliance_Frameworks\" >Compliance Frameworks<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-103\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#6_Content_Processing_Template_Rendering_Pre-Send_Validation\" >6. Content Processing, Template Rendering &amp; Pre-Send Validation<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-104\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Template_Engine_Architecture\" >Template Engine Architecture<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-105\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Pre-Send_Checks_Spam_Filters\" >Pre-Send Checks &amp; Spam Filters<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-106\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#7_Adaptive_Deliverability_Logic_and_ISP-Specific_Rules\" >7. Adaptive Deliverability Logic and ISP-Specific Rules<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-107\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#ISP-Aware_Throttling\" >ISP-Aware Throttling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-108\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Error_Code_Interpretation\" >Error Code Interpretation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-109\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Feedback_Loops_and_Engagement_Signals\" >Feedback Loops and Engagement Signals<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-110\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#8_API-Centric_Architecture_and_Extensibility\" >8. API-Centric Architecture and Extensibility<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-111\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#REST_API_Gateways\" >REST API Gateways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-112\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#SMTP_Relay_Infrastructure\" >SMTP Relay Infrastructure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-113\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Webhooks_Real-Time_Event_Processing\" >Webhooks &amp; Real-Time Event Processing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-114\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#9_Storage_Systems_Data_Pipelines_and_Analytics\" >9. Storage Systems, Data Pipelines, and Analytics<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-115\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Distributed_Storage\" >Distributed Storage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-116\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Event_Processing_Pipeline\" >Event Processing Pipeline<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-117\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#10_Security_Architecture_and_Anti-Abuse_Systems\" >10. Security Architecture and Anti-Abuse Systems<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-118\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Authentication_Authorization_Controls\" >Authentication &amp; Authorization Controls<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-119\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Anti-Abuse_Detection\" >Anti-Abuse Detection<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-120\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Data_Encryption\" >Data Encryption<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-121\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#11_Scaling_for_Peak_Deliverability\" >11. Scaling for Peak Deliverability<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-122\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Auto-Scaling_Infrastructure\" >Auto-Scaling Infrastructure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-123\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Separate_Transactional_vs_Marketing_Pipelines\" >Separate Transactional vs. Marketing Pipelines<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-124\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Traffic_Prediction_Load_Testing\" >Traffic Prediction &amp; Load Testing<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-125\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#12_Monitoring_Observability_Deliverability_Analytics\" >12. Monitoring, Observability &amp; Deliverability Analytics<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-126\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Real-Time_Monitoring_Tools\" >Real-Time Monitoring Tools<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-127\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Deliverability_Dashboards\" >Deliverability Dashboards<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-128\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#SLA_Compliance\" >SLA Compliance<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-129\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Authentication_Protocols_Compliance_in_Mailjet_SPF_DKIM_DMARC_BIMI_GDPR_and_More\" >Authentication Protocols &amp; Compliance in Mailjet: SPF, DKIM, DMARC, BIMI, GDPR, and More<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-130\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#1_Sender_Authentication_Overview\" >1. Sender Authentication Overview<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-131\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#2_SPF_Allowing_Mailjet_to_Send_on_Your_Behalf\" >2. SPF: Allowing Mailjet to Send on Your Behalf<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-132\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#How_SPF_Works\" >How SPF Works<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-133\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#SPF_in_Mailjet\" >SPF in Mailjet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-134\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#3_DKIM_Cryptographic_Signing_for_Message_Integrity\" >3. DKIM: Cryptographic Signing for Message Integrity<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-135\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#How_DKIM_Works\" >How DKIM Works<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-136\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DKIM_in_Mailjet\" >DKIM in Mailjet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-137\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#4_DMARC_Policy_Enforcement_and_Reporting\" >4. DMARC: Policy Enforcement and Reporting<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-138\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#How_DMARC_Works\" >How DMARC Works<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-139\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#DMARC_in_Mailjet\" >DMARC in Mailjet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-140\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#5_BIMI_Improving_Brand_Recognition_with_Visual_Identity\" >5. BIMI: Improving Brand Recognition with Visual Identity<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-141\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Requirements_for_BIMI\" >Requirements for BIMI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-142\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#How_BIMI_Works_in_Mailjet\" >How BIMI Works in Mailjet<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-143\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#6_GDPR_Compliance_in_Mailjet\" >6. GDPR Compliance in Mailjet<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-144\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Key_GDPR_Principles_Supported_by_Mailjet\" >Key GDPR Principles Supported by Mailjet<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-145\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#1_Data_Security_and_Encryption\" >1. Data Security and Encryption<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-146\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#2_Data_Processing_Agreements\" >2. Data Processing Agreements<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-147\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#3_Data_Minimization_and_Purpose_Limitation\" >3. Data Minimization and Purpose Limitation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-148\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#4_Subscriber_Consent_and_Preferences\" >4. Subscriber Consent and Preferences<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-149\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#5_Data_Residency_in_the_EU\" >5. Data Residency in the EU<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-150\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#6_Data_Subject_Rights\" >6. Data Subject Rights<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-151\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#7_The_Combined_Impact_on_Deliverability_and_Trust\" >7. The Combined Impact on Deliverability and Trust<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-152\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Case_Studies_Real-World_Deliverability_Outcomes_via_Mailjet\" >Case Studies: Real-World Deliverability Outcomes via Mailjet<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-153\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#1_E-Commerce_Retailer_Boosts_Inbox_Placement_During_Seasonal_Peaks\" >1. E-Commerce Retailer Boosts Inbox Placement During Seasonal Peaks<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-154\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Challenge\" >Challenge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-155\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Solution\" >Mailjet Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-156\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Outcome\" >Outcome<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-157\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#2_SaaS_Company_Reduces_Onboarding_Drop-Off_via_Improved_Transactional_Email_Deliverability\" >2. SaaS Company Reduces Onboarding Drop-Off via Improved Transactional Email Deliverability<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-158\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Challenge-2\" >Challenge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-159\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Solution-2\" >Mailjet Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-160\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Outcome-2\" >Outcome<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-161\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#3_Global_Nonprofit_Enhances_Engagement_by_30_Through_List_Hygiene_and_Personalization\" >3. Global Nonprofit Enhances Engagement by 30% Through List Hygiene and Personalization<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-162\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Challenge-3\" >Challenge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-163\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Solution-3\" >Mailjet Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-164\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Outcome-3\" >Outcome<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-165\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#4_Marketplace_Platform_Harmonizes_Cross-Team_Email_Sending_with_Mailjets_Collaboration_Features\" >4. Marketplace Platform Harmonizes Cross-Team Email Sending with Mailjet\u2019s Collaboration Features<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-166\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Challenge-4\" >Challenge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-167\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Mailjet_Solution-4\" >Mailjet Solution<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-168\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Outcome-4\" >Outcome<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-169\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"210\" data-end=\"226\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span><strong data-start=\"210\" data-end=\"226\">Introduction<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"228\" data-end=\"1040\">Email remains one of the most powerful communication channels for organizations seeking to reach customers, nurture leads, and build long-term relationships. However, the success of any email strategy ultimately depends on one critical factor: deliverability. No matter how compelling the content or attractive the design, an email has little value if it never reaches the recipient\u2019s inbox. In this landscape, Mailjet\u2014known for combining a user-friendly email builder with a robust infrastructure\u2014has positioned itself as a leading solution for businesses that require reliable delivery rates at scale. Understanding Mailjet\u2019s deliverability performance therefore becomes essential for marketers, developers, and organizations evaluating email service providers (ESPs) as part of their communication ecosystems.<\/p>\n<p data-start=\"1042\" data-end=\"1821\">Deliverability refers to the ability of an email to be accepted by the recipient\u2019s mail server and placed in the inbox rather than filtered to spam or blocked entirely. This process is not governed by a single mechanism but instead by a complex interplay of technical protocols, sender reputation, authentication frameworks, content quality, and engagement behavior. ESPs play a major role in helping senders navigate these factors, offering infrastructure and tools that increase the likelihood of successful inbox placement. Mailjet\u2019s platform is built around this idea, offering real-time event tracking, email authentication support, dedicated IP options, and optimization features designed to uphold high deliverability standards across diverse industries and message types.<\/p>\n<p data-start=\"1823\" data-end=\"2558\">One of the core pillars of Mailjet\u2019s deliverability performance lies in its infrastructure. Emails must travel through a series of digital checkpoints before landing in a user\u2019s inbox, and a modern, well-maintained infrastructure ensures that sending is both fast and stable. Mailjet uses scalable cloud-based architecture to process high volumes of mail efficiently, which is especially beneficial for businesses that send transactional messages\u2014such as password resets, order confirmations, and authentication codes\u2014where timeliness is critical. Furthermore, throughput capacity and redundancy measures reduce delays and service interruptions, creating a consistent sending environment that mailbox providers come to trust over time.<\/p>\n<p data-start=\"2560\" data-end=\"3361\">Beyond infrastructure, Mailjet places strong emphasis on authentication protocols\u2014which serve as the foundation for sender credibility. Protocols such as SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), and DMARC (Domain-based Message Authentication, Reporting, and Conformance) help verify that an email is truly coming from the domain it claims to represent. Mailjet streamlines the implementation of these protocols by providing clear setup instructions and domain validation tools. Proper authentication significantly reduces spoofing and phishing risks, contributing to a better sender reputation and improved inbox placement. For businesses that rely heavily on brand trust and security, this aspect of Mailjet\u2019s deliverability performance offers a valuable layer of protection.<\/p>\n<p data-start=\"3363\" data-end=\"4128\">Sender reputation is another key factor influencing whether an email reaches the inbox or is rejected by spam filters. Reputation is shaped by sending practices, complaint rates, bounce rates, and user engagement signals. Mailjet supports reputation management in multiple ways. Its platform enforces best practices by preventing high-risk sending behaviors, such as sending to large numbers of inactive or invalid email addresses. Features like segmentation, contact list cleaning, and suppression list management allow senders to maintain a healthier database, which directly influences deliverability outcomes. Mailjet also monitors bounce classifications and feedback loop data, helping users identify issues early and adjust their sending strategy accordingly.<\/p>\n<p data-start=\"4130\" data-end=\"4792\">In addition, Mailjet\u2019s deliverability team provides ongoing monitoring and guidance, offering insights into emerging mailbox provider policies and industry-wide shifts. Email deliverability is a constantly evolving field: spam filters grow more sophisticated, new authentication standards emerge, and user expectations change. Mailjet\u2019s experts help customers stay aligned with these developments, ensuring that sending patterns remain compliant with modern filtering algorithms. This expert support is particularly useful for businesses scaling their email programs or entering new international markets where local regulations and filtering systems may differ.<\/p>\n<p data-start=\"4794\" data-end=\"5460\">Content quality also plays a subtle but influential role in deliverability. While no ESP can control the content a sender chooses to distribute, Mailjet assists by offering tools that encourage best-practice design and testing. Its drag-and-drop editor produces clean, responsive code that performs well across devices and mailbox clients. The platform also enables A\/B testing, allowing senders to compare variations of subject lines, layouts, and calls-to-action. By identifying content formats that drive higher engagement, senders indirectly improve deliverability, since mailbox providers reward messages that recipients open, click, and actively interact with.<\/p>\n<p data-start=\"5462\" data-end=\"5968\">Finally, real-time analytics give senders crucial visibility into deliverability performance. Mailjet tracks key metrics\u2014opens, clicks, bounces, blocks, and spam complaints\u2014along with detailed event logs for each sent message. These insights help organizations identify trends, troubleshoot issues, and continuously refine their sending strategy. A data-driven approach enables businesses to anticipate deliverability challenges rather than react to them after inbox placement has already been compromised.<\/p>\n<p data-start=\"5970\" data-end=\"6462\" data-is-last-node=\"\" data-is-only-node=\"\">In a digital environment where inbox competition is fierce and user expectations are high, Mailjet\u2019s deliverability performance stands out as a combination of strong infrastructure, authentication support, compliance standards, and data-driven optimization. By integrating reliable deliverability features into an accessible platform, Mailjet empowers organizations of all sizes to send messages with greater confidence\u2014and ensures that communications reach the audiences that depend on them.<\/p>\n<h2 data-start=\"175\" data-end=\"200\"><span class=\"ez-toc-section\" id=\"Origins_and_Founding\"><\/span>Origins and Founding<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"202\" data-end=\"1030\">\n<li data-start=\"202\" data-end=\"392\">\n<p data-start=\"204\" data-end=\"392\">Mailjet was founded in <strong data-start=\"227\" data-end=\"235\">2010<\/strong> in France, by <strong data-start=\"250\" data-end=\"269\">Wilfried Durand<\/strong> and <strong data-start=\"274\" data-end=\"293\">Julien Tartarin<\/strong>. Its conceptual roots lie in the startup studio eFounders. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/en.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"393\" data-end=\"696\">\n<p data-start=\"395\" data-end=\"696\">The idea behind Mailjet was to build a cloud-based platform to make email delivery simpler and more scalable for both marketing and transactional use cases \u2014 combining features useful to developers (APIs \/ SMTP relay) and marketers (email campaigns, templates). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"697\" data-end=\"1030\">\n<p data-start=\"699\" data-end=\"1030\">Early on, Mailjet focused on solving a key pain point: many small or medium businesses (SMBs) either lacked the infrastructure to run reliable SMTP\/email servers or found it too complex. Mailjet offered a hosted alternative with visibility into delivery metrics, opens, clicks, bounces, etc. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/techcrunch.com\/2011\/12\/08\/mailjet-raises-180000-euros-helps-companies-send-and-track-emails-2\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1037\" data-end=\"1066\"><span class=\"ez-toc-section\" id=\"Early_Growth_and_Funding\"><\/span>Early Growth and Funding<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"1068\" data-end=\"2527\">\n<li data-start=\"1068\" data-end=\"1240\">\n<p data-start=\"1070\" data-end=\"1240\">By December 2011, Mailjet had raised <strong data-start=\"1107\" data-end=\"1119\">\u20ac180,000<\/strong> from eFounders \u2014 this small initial round helped the company get off the ground. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/techcrunch.com\/2011\/12\/08\/mailjet-raises-180000-euros-helps-companies-send-and-track-emails-2\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1241\" data-end=\"1458\">\n<p data-start=\"1243\" data-end=\"1458\">In November 2012, Mailjet raised <strong data-start=\"1276\" data-end=\"1295\">US $3.3 million<\/strong> from investors including Alven Capital and private investors, enabling further development of its cloud-emailing solution. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/techcrunch.com\/2012\/11\/29\/scrappy-cloud-hosted-emailer-mailjet-raises-3-3-million\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1459\" data-end=\"1659\">\n<p data-start=\"1461\" data-end=\"1659\">As early as mid 2012, Mailjet announced that it was handling nearly <strong data-start=\"1529\" data-end=\"1554\">1 billion emails sent<\/strong> \u2014 a key milestone demonstrating both traction and scalability. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/techcrunch.com\/2012\/04\/18\/cloud-emailer-mailjet-hits-1-billion-emails-sent-launches-apps-for-tracking-emails-in-real-time\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1660\" data-end=\"1802\">\n<p data-start=\"1662\" data-end=\"1802\">In 2014, Mailjet raised another <strong data-start=\"1694\" data-end=\"1710\">\u20ac2.2 million<\/strong> to support its expansion and development efforts. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1803\" data-end=\"2048\">\n<p data-start=\"1805\" data-end=\"2048\">The biggest early growth came in July 2015, when Mailjet secured <strong data-start=\"1870\" data-end=\"1888\">US $11 million<\/strong> in Series B funding (led by Iris Capital, with returning investor Alven Capital and new investor Seventure Partners). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"2049\" data-end=\"2336\">\n<p data-start=\"2051\" data-end=\"2336\">At that time, Mailjet reported <strong data-start=\"2082\" data-end=\"2118\">75% year-on-year customer growth<\/strong>, with more than <strong data-start=\"2135\" data-end=\"2181\">32,000 customers across over 150 countries<\/strong>. The capital was earmarked to expand operations mainly in North America, Southern Europe, and the Nordic region. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"2337\" data-end=\"2527\">\n<p data-start=\"2339\" data-end=\"2527\">The 2015 funding round also supported a major team expansion: Mailjet planned to grow its headcount from about 40 (in 2014) to nearly 100 by 2016. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"2534\" data-end=\"2581\"><span class=\"ez-toc-section\" id=\"Product_Evolution_and_Technical_Maturation\"><\/span>Product Evolution and Technical Maturation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2583\" data-end=\"2752\">As Mailjet grew, so did its product offerings \u2014 evolving from a developers\u2019 SMTP-relay solution to a full-fledged email marketing platform. Some of the key developments:<\/p>\n<ul data-start=\"2754\" data-end=\"4369\">\n<li data-start=\"2754\" data-end=\"3088\">\n<p data-start=\"2756\" data-end=\"3088\">In 2014, under new leadership (with Alexis Renard as CEO), Mailjet pivoted toward a more enterprise-ready offering: expanding beyond self-service tools to bespoke solutions for businesses with larger and more complex emailing needs. They built out extendable APIs and enhanced feature sets. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3089\" data-end=\"3349\">\n<p data-start=\"3091\" data-end=\"3349\">That same year, Mailjet introduced a new API suite, plus capabilities such as campaign-performance comparison and A\/B testing (including advanced \u201cA\/X testing\u201d that lets marketers test up to 10 variants of an email). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3350\" data-end=\"3587\">\n<p data-start=\"3352\" data-end=\"3587\">In 2015, Mailjet launched <strong data-start=\"3378\" data-end=\"3390\">Passport<\/strong> \u2014 a drag-and-drop, WYSIWYG email design tool that made building responsive marketing emails easier and more accessible to non-developers (e.g. marketers). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3588\" data-end=\"3796\">\n<p data-start=\"3590\" data-end=\"3796\">Over time, Mailjet extended integrations with popular CMS, CRM, e-commerce and SaaS platforms \u2014 enabling seamless embedding of email capabilities into applications. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Whub<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3797\" data-end=\"4074\">\n<p data-start=\"3799\" data-end=\"4074\">By 2017, Mailjet became the first EU-data-compliant email provider available through the Microsoft Azure App Marketplace \u2014 which was a milestone for European customers concerned with data-privacy, GDPR, and infrastructure compliance. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.prnewswire.com\/news-releases\/mailjet-becomes-the-first-eu-data-compliant-email-provider-available-on-microsoft-azure-612397953.html?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">PR Newswire<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"4075\" data-end=\"4369\">\n<p data-start=\"4077\" data-end=\"4369\">As of the mid-2020s, Mailjet (now often \u201cMailjet by Sinch\u201d) offers a comprehensive suite: drag-and-drop design, email templates, marketing automation, transactional email API, SMTP relay, deliverability services, and real-time analytics\/dashboarding. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"4376\" data-end=\"4421\"><span class=\"ez-toc-section\" id=\"International_Expansion_and_Global_Reach\"><\/span>International Expansion and Global Reach<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"4423\" data-end=\"5243\">\n<li data-start=\"4423\" data-end=\"4686\">\n<p data-start=\"4425\" data-end=\"4686\">Although born in France (originally in Nantes, later headquartered in Paris), Mailjet quickly expanded internationally \u2014 establishing offices in multiple major cities including New York, London, Berlin, Sofia, and more. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/alven.co\/mailjet-acquired-mailgun\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Alven<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"4687\" data-end=\"4848\">\n<p data-start=\"4689\" data-end=\"4848\">This global footprint allowed Mailjet to serve customers worldwide \u2014 by 2015, its clients were in over 150 countries. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"4849\" data-end=\"4978\">\n<p data-start=\"4851\" data-end=\"4978\">By 2025 (per official info), Mailjet claims to serve <strong data-start=\"4904\" data-end=\"4935\">100,000+ customers globally<\/strong>. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"4979\" data-end=\"5243\">\n<p data-start=\"4981\" data-end=\"5243\">Mailjet\u2019s infrastructure and compliance (including EU-data hosting, GDPR and ISO certification) made it especially attractive for European businesses and global enterprises seeking data-privacy conscious email solutions. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"5250\" data-end=\"5312\"><span class=\"ez-toc-section\" id=\"Acquisition_History_and_Integration_into_Larger_Ecosystem\"><\/span>Acquisition History and Integration into Larger Ecosystem<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5314\" data-end=\"5482\">Mailjet\u2019s success and growth trajectory led to its acquisition and integration into larger entities \u2014 reflecting consolidation trends in the ESP \/ communications space.<\/p>\n<ul data-start=\"5484\" data-end=\"6466\">\n<li data-start=\"5484\" data-end=\"5718\">\n<p data-start=\"5486\" data-end=\"5718\">On <strong data-start=\"5489\" data-end=\"5509\">October 22, 2019<\/strong>, Mailjet was acquired by Mailgun (a U.S.-based email delivery service), thereby combining a major European email marketing provider with a strong U.S. infrastructure. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/alven.co\/mailjet-acquired-mailgun\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Alven<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"5719\" data-end=\"5940\">\n<p data-start=\"5721\" data-end=\"5940\">At the time, this acquisition was presented as a strategic move to create a global leader in emailing \u2014 combining the product strengths and geographical reach of both companies. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/medium.com\/inside-hexa\/mailjet-ef11-acquired-by-mailgun-f681d386ce2f?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Medium<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Alven<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"5941\" data-end=\"6160\">\n<p data-start=\"5943\" data-end=\"6160\">A few years later \u2014 on <strong data-start=\"5966\" data-end=\"5986\">December 7, 2021<\/strong> \u2014 Mailjet (together with the rest of Mailgun\u2019s portfolio) officially became part of Sinch (a Swedish cloud-communications company). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/blog\/company\/mailjet-joins-sinch\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"6161\" data-end=\"6466\">\n<p data-start=\"6163\" data-end=\"6466\">Under Sinch, Mailjet remains a standalone brand focused on email \u2014 but as part of a broader omnichannel communications offering \u2014 meaning Mailjet customers potentially gain access to other channels (SMS, voice, verification APIs) via the larger Sinch ecosystem. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/blog\/company\/mailjet-joins-sinch\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"6473\" data-end=\"6514\"><span class=\"ez-toc-section\" id=\"Mailjets_Place_in_the_ESP_Ecosystem\"><\/span>Mailjet\u2019s Place in the ESP Ecosystem<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6516\" data-end=\"6640\">Understanding Mailjet\u2019s role requires situating it among other email-service providers and looking at what distinguishes it:<\/p>\n<h3 data-start=\"6642\" data-end=\"6685\"><span class=\"ez-toc-section\" id=\"%F0%9F%A7%B0_Dual_Focus_Developers_Marketers\"><\/span>\ud83e\uddf0 Dual Focus: Developers + Marketers<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"6687\" data-end=\"7334\">\n<li data-start=\"6687\" data-end=\"7020\">\n<p data-start=\"6689\" data-end=\"7020\">Many ESPs lean heavily toward marketers (drag-and-drop campaigns, lists, segmentation), or developers (raw SMTP\/API, deliverability, scalability). Mailjet built a bridge: offering powerful APIs and SMTP for developers <strong data-start=\"6907\" data-end=\"6914\">and<\/strong> user-friendly campaign builders and design tools for marketers. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"7021\" data-end=\"7334\">\n<p data-start=\"7023\" data-end=\"7334\">This dual-focus made Mailjet appealing to small startups, SaaS companies, e-commerce platforms, and marketing teams \u2014 organizations that need both transactional (e.g. signup confirmations, receipts) and marketing emails (newsletters, promotions) from a single provider. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Whub<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"7336\" data-end=\"7403\"><span class=\"ez-toc-section\" id=\"%F0%9F%8C%8D_Regulatory_Data-Privacy_Strength_Especially_for_Europe\"><\/span>\ud83c\udf0d Regulatory &amp; Data-Privacy Strength (Especially for Europe)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"7405\" data-end=\"7890\">\n<li data-start=\"7405\" data-end=\"7667\">\n<p data-start=\"7407\" data-end=\"7667\">With EU-based data centers, GDPR compliance, ISO certification, and a track record of compliance with data protection laws, Mailjet has been a go-to for European companies or any business requiring strict data-privacy. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"7668\" data-end=\"7890\">\n<p data-start=\"7670\" data-end=\"7890\">Its early integration with platforms like Microsoft Azure (with EU-data compliance) reinforced its appeal to enterprises worried about location of data and regulatory compliance. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.prnewswire.com\/news-releases\/mailjet-becomes-the-first-eu-data-compliant-email-provider-available-on-microsoft-azure-612397953.html?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">PR Newswire<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"7892\" data-end=\"7936\"><span class=\"ez-toc-section\" id=\"%F0%9F%8C%90_Global_Reach_Multilingual_Support\"><\/span>\ud83c\udf10 Global Reach &amp; Multilingual Support<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"7938\" data-end=\"8527\">\n<li data-start=\"7938\" data-end=\"8245\">\n<p data-start=\"7940\" data-end=\"8245\">Mailjet\u2019s international offices, multilingual support (English, French, Spanish, German, etc.), and global infrastructure enabled it to serve businesses across continents \u2014 making it more appealing to multinational organizations than some smaller, localized ESPs. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/alven.co\/mailjet-acquired-mailgun\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Alven<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Whub<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"8246\" data-end=\"8527\">\n<p data-start=\"8248\" data-end=\"8527\">The fact that Mailjet claims hundreds of thousands of customers (100,000+ globally by recent figures) underscores its role as one of the global ESP heavyweights \u2014 albeit probably less mainstream globally than some of the largest players. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"8529\" data-end=\"8574\"><span class=\"ez-toc-section\" id=\"%F0%9F%93%A6_Integrated_Scalable_Infrastructure\"><\/span>\ud83d\udce6 Integrated &amp; Scalable Infrastructure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"8576\" data-end=\"9082\">\n<li data-start=\"8576\" data-end=\"8816\">\n<p data-start=\"8578\" data-end=\"8816\">With SMTP relay, APIs, drag-and-drop editors, responsive email design (via its own templating \/ markup language), campaign automation, analytics \u2014 Mailjet offers a full stack for email operations. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.seventure.fr\/wp-content\/uploads\/2017\/04\/150715-Mailjet-VA.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">hexa.com<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"8817\" data-end=\"9082\">\n<p data-start=\"8819\" data-end=\"9082\">For SaaS and e-commerce companies, Mailjet\u2019s \u201cembedded\u201d solution \u2014 allowing them to embed mailing functionality into their own products \u2014 means they can offer in-product emailing without building their own infrastructure. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"9084\" data-end=\"9143\"><span class=\"ez-toc-section\" id=\"%F0%9F%94%97_Part_of_a_Larger_Communications_Platform_via_Sinch\"><\/span>\ud83d\udd17 Part of a Larger Communications Platform via Sinch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"9145\" data-end=\"9718\">\n<li data-start=\"9145\" data-end=\"9453\">\n<p data-start=\"9147\" data-end=\"9453\">As part of Sinch, Mailjet gains the advantage of being integrated into a broader communications ecosystem. For businesses looking to combine email with other channels (SMS, voice, verification, etc.), this gives Mailjet a structural advantage over standalone ESPs. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/blog\/company\/mailjet-joins-sinch\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"9454\" data-end=\"9718\">\n<p data-start=\"9456\" data-end=\"9718\">This positions Mailjet not just as an email tool, but as a component in omnichannel customer-engagement strategies \u2014 useful for organizations that want to reach customers across multiple channels from a unified platform. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/blog\/company\/mailjet-joins-sinch\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"9725\" data-end=\"9775\"><span class=\"ez-toc-section\" id=\"Challenges_Competition_and_Industry_Context\"><\/span>Challenges, Competition, and Industry Context<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"9777\" data-end=\"9891\">While Mailjet has many strengths, it exists within a competitive and evolving ESP landscape. A few considerations:<\/p>\n<ul data-start=\"9893\" data-end=\"11409\">\n<li data-start=\"9893\" data-end=\"10288\">\n<p data-start=\"9895\" data-end=\"10288\">The ESP market includes many strong players \u2014 including those focused primarily on marketing (newsletters, email automation) and those focused on transactional\/delivery (SMTP, APIs). Mailjet\u2019s hybrid model gives it flexibility, but also means it must compete on multiple fronts. For example, these competitors include legacy and well-funded platforms. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/techcrunch.com\/2012\/11\/29\/scrappy-cloud-hosted-emailer-mailjet-raises-3-3-million\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">TechCrunch<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"10289\" data-end=\"11027\">\n<p data-start=\"10291\" data-end=\"10785\">Deliverability and email-spam filtering remain perennial challenges for any ESP. Users of Mailjet (as with any provider) need to set up authentication (SPF, DKIM, DMARC), monitor sending reputation, and craft good content to avoid landing in spam\/promotions folders. Indeed, some community users report deliverability issues when using Mailjet (especially with new domains or lack of sender reputation) \u2014 a challenge not unique to Mailjet but endemic to email service in general. For example:<\/p>\n<blockquote data-start=\"10789\" data-end=\"11027\">\n<p data-start=\"10791\" data-end=\"11027\">\u201cI am now unable to send ANY emails and they are all coming back as &#8216;Blocked&#8217; and the reasoning is &#8216;Spam Preblocked&#8217; \u2026 I have set up the SPF\/DKIM Authentication and it shows &#8216;OK&#8217; in the portal.\u201d <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.reddit.com\/\/r\/email\/comments\/gd37l2?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Reddit<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/blockquote>\n<\/li>\n<li data-start=\"11029\" data-end=\"11409\">\n<p data-start=\"11031\" data-end=\"11409\">As organizations scale, many expect advanced marketing automation, segmentation, personalization, analytics, multi-channel campaigns, and integration with other systems (CRM, analytics, etc.). Some ESPs specialize deeply in aspects of this (e.g., marketing automation, analytics) \u2014 so Mailjet must balance its generalist strengths against specialized tools in certain domains.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"11416\" data-end=\"11483\"><span class=\"ez-toc-section\" id=\"Mailjet_Today_as_of_2025_Its_Position_in_the_ESP_Ecosystem\"><\/span>Mailjet Today (as of 2025) &amp; Its Position in the ESP Ecosystem<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"11485\" data-end=\"12771\">\n<li data-start=\"11485\" data-end=\"11656\">\n<p data-start=\"11487\" data-end=\"11656\">As of now, Mailjet describes itself as \u201cglobal email marketing and email API platform,\u201d aimed at both marketers and developers. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"11657\" data-end=\"11836\">\n<p data-start=\"11659\" data-end=\"11836\">It remains part of the broader Sinch AB communications cloud \u2014 giving users access to an omnichannel communications suite beyond email. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/blog\/company\/mailjet-joins-sinch\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"11837\" data-end=\"12207\">\n<p data-start=\"11839\" data-end=\"12207\">The platform supports email marketing (campaigns, automation, templates), transactional email (API, SMTP relay), analytic and deliverability features (dashboards, real-time tracking), integrations with CMS\/CRM\/SaaS, and embedded solutions for SaaS companies \u2014 making it a versatile tool for businesses of many types and sizes. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Seventure Partners<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"12208\" data-end=\"12510\">\n<p data-start=\"12210\" data-end=\"12510\">For businesses \u2014 especially those in regions where data-privacy compliance is important (e.g., EU, or operating globally) \u2014 Mailjet\u2019s compliance credentials, EU-hosting infrastructure, and multilingual support make it a strong contender in the ESP ecosystem. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/ai-info\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"12511\" data-end=\"12771\">\n<p data-start=\"12513\" data-end=\"12771\">For smaller companies, startups, SaaS providers, or any organization requiring a mix of transactional + marketing email without dealing with SMTP servers themselves or managing complicated infrastructure \u2014 Mailjet remains a viable, well-established option.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"12778\" data-end=\"12804\"><span class=\"ez-toc-section\" id=\"Significance_Legacy\"><\/span>Significance &amp; Legacy<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"12806\" data-end=\"13655\">\n<li data-start=\"12806\" data-end=\"12981\">\n<p data-start=\"12808\" data-end=\"12981\">Mailjet is one of the earliest European-born cloud-based ESPs that gained truly global reach \u2014 bridging European data-privacy regulations with global email deliverability.<\/p>\n<\/li>\n<li data-start=\"12982\" data-end=\"13188\">\n<p data-start=\"12984\" data-end=\"13188\">Its hybrid model \u2014 catering equally to developers (via APIs\/SMTP) and marketers (templates, drag-and-drop editors, automation) \u2014 influenced how modern ESPs think about flexibility and user segmentation.<\/p>\n<\/li>\n<li data-start=\"13189\" data-end=\"13443\">\n<p data-start=\"13191\" data-end=\"13443\">Through its expansion, adoption, and eventual acquisition by larger players (Mailgun, then Sinch), Mailjet exemplifies a broader trend in the communications industry: consolidation of specialized ESPs into larger omnichannel communications platforms.<\/p>\n<\/li>\n<li data-start=\"13444\" data-end=\"13655\">\n<p data-start=\"13446\" data-end=\"13655\">Mailjet\u2019s trajectory shows how a startup \u2014 started with modest funding \u2014 can scale through a mix of technological innovation, global expansion, user-centric features, and strategic acquisitions\/partnerships.<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"240\" data-end=\"307\"><span class=\"ez-toc-section\" id=\"What_%E2%80%9CDeliverability%E2%80%9D_Means_and_Why_It_Matters\"><\/span>What \u201cDeliverability\u201d Means, and Why It Matters<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"309\" data-end=\"517\">In email marketing, \u201cdeliverability\u201d refers to <strong data-start=\"356\" data-end=\"414\">the ability of an email to reach its recipient\u2019s inbox<\/strong>, rather than being filtered out to spam or blocked altogether. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360042624114-What-is-deliverability?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"519\" data-end=\"789\">Achieving high deliverability is far from trivial. It involves technical infrastructure (sender identity and authentication), list hygiene, content quality, sending practices, engagement metrics, and ongoing reputation management. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"791\" data-end=\"1191\">Over the years, Mailjet has evolved from a basic cloud-email delivery service into a robust, feature-rich platform \u2014 offering optimization, analytics, automation, and specialized deliverability tools. This evolution illustrates how modern Email Service Providers (ESPs) have had to adapt to increasingly strict requirements from mailbox providers (ISPs), and to growing expectations from marketers.<\/p>\n<p data-start=\"1193\" data-end=\"1416\">In this essay, I trace how Mailjet\u2019s deliverability capabilities have developed, what tools and practices it supports today, and how this reflects broader trends in email deliverability and email marketing best practices.<\/p>\n<h2 data-start=\"1423\" data-end=\"1463\"><span class=\"ez-toc-section\" id=\"Origins_and_Early_Growth_of_Mailjet\"><\/span>Origins and Early Growth of Mailjet<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul data-start=\"1465\" data-end=\"2322\">\n<li data-start=\"1465\" data-end=\"1619\">\n<p data-start=\"1467\" data-end=\"1619\">Mailjet was founded in 2010 with the goal of providing email delivery (marketing + transactional) via the cloud. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/es.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1620\" data-end=\"1861\">\n<p data-start=\"1622\" data-end=\"1861\">Over time, Mailjet gained customers globally; by mid-2010s it supported users in many countries, and offered both marketing and transactional mail capabilities via API, SMTP relay, and web interface. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/es.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"1862\" data-end=\"2060\">\n<p data-start=\"1864\" data-end=\"2060\">A milestone in 2014: Mailjet introduced a new API, along with new features like campaign performance comparisons (i.e. analytics) and an A\/B testing system. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"2061\" data-end=\"2322\">\n<p data-start=\"2063\" data-end=\"2322\">Alongside API improvements, in 2015 Mailjet launched &#8220;Passport&#8221;, a WYSIWYG (What-You-See-Is-What-You-Get) email newsletter builder, helping marketers produce responsive, cleanly-coded emails without deep HTML knowledge. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/fr.wikipedia.org\/wiki\/Mailjet?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Wikipedia<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2324\" data-end=\"2570\">These early advances laid the foundation for more sophisticated deliverability features: the ability to send both transactional and marketing emails programmatically; tools to design and build clean emails; and analytics to measure performance.<\/p>\n<h2 data-start=\"2577\" data-end=\"2648\"><span class=\"ez-toc-section\" id=\"From_Sending_to_Delivering_%E2%80%94_The_Shift_Toward_Deliverability_Focus\"><\/span>From Sending to Delivering \u2014 The Shift Toward Deliverability Focus<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2650\" data-end=\"2946\">As Mailjet matured, it became clear that the challenge wasn\u2019t just <strong data-start=\"2717\" data-end=\"2728\">sending<\/strong> emails, but <strong data-start=\"2741\" data-end=\"2777\">getting them delivered correctly<\/strong>. Various factors make deliverability hard \u2014 sender reputation, list quality, content, frequency, domain\/IP reputation, and more. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360042624114-What-is-deliverability?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<h3 data-start=\"2948\" data-end=\"2988\"><span class=\"ez-toc-section\" id=\"Authentication_and_Sender_Identity\"><\/span>Authentication and Sender Identity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2990\" data-end=\"3210\">One of the most important developments: Mailjet supports the essential email-authentication protocols \u2014 <strong data-start=\"3094\" data-end=\"3101\">SPF<\/strong>, <strong data-start=\"3103\" data-end=\"3111\">DKIM<\/strong>, and <strong data-start=\"3117\" data-end=\"3126\">DMARC<\/strong> \u2014 to prove that the sender is legitimate. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360042624274-How-Mailjet-Boosts-Your-Email-Deliverability?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<ul data-start=\"3212\" data-end=\"3885\">\n<li data-start=\"3212\" data-end=\"3368\">\n<p data-start=\"3214\" data-end=\"3368\">SPF and DKIM help verify that the email comes from an authorized server and its contents were not tampered with. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3369\" data-end=\"3565\">\n<p data-start=\"3371\" data-end=\"3565\">DMARC builds on SPF and DKIM by allowing domain owners to instruct ISPs on how to treat unauthenticated or suspicious emails (reject, quarantine, etc.). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"3566\" data-end=\"3885\">\n<p data-start=\"3568\" data-end=\"3885\">In recent years (notably around 2024), major mailbox providers such as Gmail and Yahoo Mail reportedly began enforcing stricter authentication requirements for bulk or large-volume senders: SPF + DKIM became mandatory, and DMARC was needed for better compliance and security. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3887\" data-end=\"4072\">Mailjet\u2019s early and continued support for these authentication standards positioned it to help senders adapt to evolving ISP requirements, thus improving deliverability significantly.<\/p>\n<h3 data-start=\"4074\" data-end=\"4133\"><span class=\"ez-toc-section\" id=\"Infrastructure_Shared_vs_Dedicated_IP_IP_Reputation\"><\/span>Infrastructure: Shared vs Dedicated IP, IP Reputation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4135\" data-end=\"4517\">In its pricing\/plan structure, Mailjet reflects deliverability-conscious infrastructure choices. According to its plan documentation: for higher-volume users (starting with the \u201c100,000 Premium and above\u201d tier), Mailjet offers the option of a <strong data-start=\"4378\" data-end=\"4394\">dedicated IP<\/strong> \u2014 meaning the sender is not sharing sending reputation with other Mailjet users. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/1260803978230-How-It-Works?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"4519\" data-end=\"4880\">This matters because IP reputation plays a huge role in deliverability: spam filters and mailbox providers track how an IP behaves over time (bounce rates, spam complaints, sending volume\/patterns). A clean, dedicated IP lets a sender build and control their own sending reputation, which is especially critical for transactional emails and high-volume senders.<\/p>\n<p data-start=\"4882\" data-end=\"5075\">Additionally, Mailjet claims to monitor and manage &#8220;IP Reputation Engine&#8221; when users opt for dedicated IP \u2014 choosing the best route for deliverability. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/1260803978230-How-It-Works?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"5077\" data-end=\"5251\">Thus Mailjet evolved from a simple shared-IP cloud sender to giving serious senders the tools to own and manage their sending reputation \u2014 a key deliverability determinant.<\/p>\n<h2 data-start=\"5258\" data-end=\"5327\"><span class=\"ez-toc-section\" id=\"Deliverability_Hygiene_Content_Quality_%E2%80%94_Beyond_Infrastructure\"><\/span>Deliverability Hygiene &amp; Content Quality \u2014 Beyond Infrastructure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5329\" data-end=\"5519\">Deliverability isn\u2019t only about IPs and authentication. Over time, Mailjet built features and guidelines focused on <strong data-start=\"5445\" data-end=\"5516\">list hygiene, content quality, recipient engagement, and compliance<\/strong>.<\/p>\n<h3 data-start=\"5521\" data-end=\"5559\"><span class=\"ez-toc-section\" id=\"List_Hygiene_and_Spam_Protection\"><\/span>List Hygiene and Spam Protection<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5561\" data-end=\"5826\">In its deliverability guide, Mailjet emphasizes the importance of building a high-quality email list: avoid purchased or scraped lists, exclude \u201crole accounts\u201d (e.g. info@, admin@), and remove invalid or inactive addresses. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"5828\" data-end=\"6097\">To help, Mailjet offers <strong data-start=\"5852\" data-end=\"5880\">email address validation<\/strong> as part of its service \u2014 to ensure the addresses in your list are valid before sending, reducing the chances of hard bounces or fake\/spam addresses that hurt your reputation. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/wp-content\/uploads\/pdf\/EN_-_MJ_-_Road_to_Inbox_-_2025_-_v1_3.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"6099\" data-end=\"6302\">Also, Mailjet enforces strict policies: disallowing purchased third-party lists, banning high-risk list sources, and monitoring for spam complaints\/unsubscribes. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.emailtooltester.com\/en\/reviews\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">EmailTooltester.com<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<h3 data-start=\"6304\" data-end=\"6357\"><span class=\"ez-toc-section\" id=\"Content_Quality_Formatting_and_Best_Practices\"><\/span>Content Quality, Formatting, and Best Practices<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6359\" data-end=\"6659\">Even a technically perfect email can end up in spam if the content triggers spam filters or appears suspicious. Mailjet supports email design tools (its drag-and-drop editor, responsive templates, HTML import), ensuring clean HTML code and proper formatting. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"6661\" data-end=\"6747\">Through its guidance and best-practice recommendations, Mailjet encourages senders to:<\/p>\n<ul data-start=\"6749\" data-end=\"7485\">\n<li data-start=\"6749\" data-end=\"6874\">\n<p data-start=\"6751\" data-end=\"6874\">Maintain a healthy ratio of text to images (e.g. avoid overly image-heavy emails) <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"6875\" data-end=\"7072\">\n<p data-start=\"6877\" data-end=\"7072\">Avoid spam-trigger words (especially in certain industries or types of content), and avoid suspicious attachments\/links or excessive promotional wording. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"7073\" data-end=\"7275\">\n<p data-start=\"7075\" data-end=\"7275\">Use clear unsubscribe links, respect privacy compliance (e.g. for GDPR, CAN-SPAM), and ensure transparency for recipients \u2014 which helps avoid spam complaints. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"7276\" data-end=\"7485\">\n<p data-start=\"7278\" data-end=\"7485\">Personalize messages, segment audiences, and send relevant, engaging content \u2014 because engagement (open, click rates) influences deliverability positively over time. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7487\" data-end=\"7654\">By combining content quality, compliance, and personalization best practices \u2014 not just technical settings \u2014 Mailjet helps users address deliverability holistically.<\/p>\n<h2 data-start=\"7661\" data-end=\"7719\"><span class=\"ez-toc-section\" id=\"Monitoring_Feedback_and_Deliverability_Intelligence\"><\/span>Monitoring, Feedback, and Deliverability Intelligence<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"7721\" data-end=\"7957\">As email ecosystems got more complex, having tools to <strong data-start=\"7775\" data-end=\"7844\">monitor deliverability performance, identify problems, and adjust<\/strong> became increasingly important. Mailjet responded with analytics, feedback loops, and delivery-status tracking.<\/p>\n<h3 data-start=\"7959\" data-end=\"8007\"><span class=\"ez-toc-section\" id=\"Real-Time_Analytics_Performance_Tracking\"><\/span>Real-Time Analytics &amp; Performance Tracking<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8009\" data-end=\"8224\">Mailjet provides a <strong data-start=\"8028\" data-end=\"8052\">Statistics Dashboard<\/strong> that offers real-time data on deliveries, bounces, blocks, open rates, click-through rates, unsubscribes, spam reports, and more. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/products\/email-marketing\/tracking-tools\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"8226\" data-end=\"8442\">It also includes a <strong data-start=\"8245\" data-end=\"8258\">Click Map<\/strong> feature to visualize where recipients are clicking inside the email, helping marketers understand link engagement and what content resonates. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/products\/email-marketing\/tracking-tools\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"8444\" data-end=\"8654\">For advanced users, Mailjet allows filtering out bot activity (to avoid skewed metrics), and also lets marketers compare campaigns over time to spot performance trends. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.emailtooltester.com\/en\/reviews\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">EmailTooltester.com<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"8656\" data-end=\"8888\">These analytic tools help diagnose deliverability problems \u2014 e.g. if bounces spike, or spam complaints increase, or open\/click rates drop \u2014 and enable users to take corrective action (clean list, adjust content, re-segment, etc.).<\/p>\n<h3 data-start=\"8890\" data-end=\"8932\"><span class=\"ez-toc-section\" id=\"Pre-blocking_Spam_Prevention_Logic\"><\/span>Pre-blocking &amp; Spam Prevention Logic<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8934\" data-end=\"9210\">A distinctive feature: Mailjet\u2019s system can <strong data-start=\"8978\" data-end=\"8993\">\u201cpre-block\u201d<\/strong> emails before sending \u2014 if the system detects potential deliverability risks (e.g. known bad address, high bounce risk, content flagged as spammy, duplicate addresses, etc.). <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360048398994-Email-statuses-all-metrics-explained?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"9212\" data-end=\"9418\">This \u201cpre-blocked\u201d status helps avoid sending emails that are likely to bounce or be rejected. Doing so proactively helps protect the sender\u2019s IP\/domain reputation. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360048398994-Email-statuses-all-metrics-explained?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"9420\" data-end=\"9632\">Additionally, Mailjet automatically stops sending to addresses that previously resulted in complaints or unsubscribes \u2014 helping list hygiene and long-term deliverability. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360042624274-How-Mailjet-Boosts-Your-Email-Deliverability?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<h3 data-start=\"9634\" data-end=\"9693\"><span class=\"ez-toc-section\" id=\"Separating_Mail_Streams_Transactional_vs_Promotional\"><\/span>Separating Mail Streams: Transactional vs Promotional<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9695\" data-end=\"10132\">Recognizing that different types of emails have different deliverability risks, Mailjet (and deliverability best practices broadly) encourage <strong data-start=\"9837\" data-end=\"9864\">separating mail streams<\/strong> \u2014 e.g. sending transactional emails (receipts, confirmations, notifications) from a different domain or IP than marketing\/promotional emails. This helps isolate \u201criskier\u201d marketing behavior from critical transactional emails. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"10134\" data-end=\"10438\">This separation helps maintain high deliverability for transactional emails even if marketing sends generate higher bounce or complaint rates. Mailjet supports this approach, giving developers and marketers tools to configure sending domains and IPs accordingly. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<h2 data-start=\"10445\" data-end=\"10514\"><span class=\"ez-toc-section\" id=\"Recent_Advances_and_2020s_Meeting_New_Challenges_ISP_Policies\"><\/span>Recent Advances and 2020s: Meeting New Challenges &amp; ISP Policies<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"10516\" data-end=\"10791\">As mailbox providers (Gmail, Yahoo, Microsoft, and others) continue to tighten spam policies, adopt stricter authentication, and modify how they evaluate sender reputation, Mailjet has adapted \u2014 offering features and guidance to help clients stay compliant and deliverable.<\/p>\n<h3 data-start=\"10793\" data-end=\"10861\"><span class=\"ez-toc-section\" id=\"Compliance_with_Evolving_Industry_Standards_ISP_Requirements\"><\/span>Compliance with Evolving Industry Standards &amp; ISP Requirements<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10863\" data-end=\"11167\">According to Mailjet\u2019s own recent documentation, the 2024-2025 period saw significant changes: Gmail and Yahoo Mail (among others) began enforcing mandatory authentication for bulk senders \u2014 requiring SPF and DKIM at minimum, DMARC for enhanced domain alignment. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"11169\" data-end=\"11530\">Mailjet expanded its deliverability guidance accordingly, helping users configure SPF, DKIM, and DMARC properly, offering DNS setup guides, facilitating \u201clist-unsubscribe headers\u201d (to support one-click unsubscribe mandated by many ISPs), and recommending use of custom domains instead of free email domains for sending. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"11532\" data-end=\"11859\">These changes reflect a broader shift in the email ecosystem: mailbox providers prioritizing security (anti-spoofing, anti-phishing), deliverability transparency, and user privacy. Deliverability now depends heavily on authentication, domain reputation, and compliance with evolving standards \u2014 not just on content or volume.<\/p>\n<h3 data-start=\"11861\" data-end=\"11921\"><span class=\"ez-toc-section\" id=\"Built-in_Email_Validation_Contact-List_Hygiene_Tools\"><\/span>Built-in Email Validation &amp; Contact-List Hygiene Tools<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11923\" data-end=\"12193\">To help senders adapt, Mailjet integrated built-in <strong data-start=\"11974\" data-end=\"11994\">email validation<\/strong> (powered by the same infrastructure as another service within its ecosystem) to help clean contact lists and weed out invalid, risky, or outdated addresses. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/wp-content\/uploads\/pdf\/EN_-_MJ_-_Road_to_Inbox_-_2025_-_v1_3.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"12195\" data-end=\"12495\">This reduces bounce rates and prevents sending to addresses that could harm sender reputation. The 2025 \u201cRoad to Inbox\u201d report by Mailjet highlights email validation as one of the most effective deliverability safeguards \u2014 especially for high-volume senders. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/wp-content\/uploads\/pdf\/EN_-_MJ_-_Road_to_Inbox_-_2025_-_v1_3.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<h3 data-start=\"12497\" data-end=\"12560\"><span class=\"ez-toc-section\" id=\"Emphasis_on_Engagement_Personalization_and_Segmentation\"><\/span>Emphasis on Engagement, Personalization, and Segmentation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12562\" data-end=\"12723\">As deliverability becomes more about reputation and engagement than raw volume, Mailjet emphasizes better content practices and more thoughtful email strategies:<\/p>\n<ul data-start=\"12725\" data-end=\"13227\">\n<li data-start=\"12725\" data-end=\"12843\">\n<p data-start=\"12727\" data-end=\"12843\">Use segmentation to target recipients with relevant, personalized content. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360043503313-Mailjet-Compliance-and-Email-Deliverability-Guide?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"12844\" data-end=\"13013\">\n<p data-start=\"12846\" data-end=\"13013\">Use dynamic content and personalization features to increase engagement \u2014 which in turn improves sender reputation over time. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"13014\" data-end=\"13227\">\n<p data-start=\"13016\" data-end=\"13227\">Provide responsive, mobile-friendly templates to reach users on various devices and ensure better display \u2014 which can influence engagement and deliverability indirectly. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/launcheurope.eu\/en\/business\/products\/digital\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"13229\" data-end=\"13397\">By shifting from \u201cspray-and-pray\u201d mass emailing to targeted, quality campaigns, Mailjet helps senders build better sender reputation and trust with mailbox providers.<\/p>\n<h2 data-start=\"13404\" data-end=\"13464\"><span class=\"ez-toc-section\" id=\"Strengths_Limitations_and_Feedback_from_the_Community\"><\/span>Strengths, Limitations, and Feedback from the Community<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"13466\" data-end=\"13644\">While Mailjet\u2019s deliverability capabilities are robust and continually evolving, there are trade-offs \u2014 and some limitations, as noted in third-party reviews and user feedback.<\/p>\n<h3 data-start=\"13646\" data-end=\"13661\"><span class=\"ez-toc-section\" id=\"Strengths\"><\/span>Strengths<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"13663\" data-end=\"14713\">\n<li data-start=\"13663\" data-end=\"13838\">\n<p data-start=\"13665\" data-end=\"13838\">Comprehensive support for authentication (SPF, DKIM, DMARC) and sender-identity configuration \u2014 critical for modern deliverability. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.emailtooltester.com\/en\/reviews\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">EmailTooltester.com<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"13839\" data-end=\"14021\">\n<p data-start=\"13841\" data-end=\"14021\">Infrastructure flexibility: shared IP for smaller senders, dedicated IP for larger\/higher-volume senders \u2014 giving control over reputation. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/1260803978230-How-It-Works?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"14022\" data-end=\"14160\">\n<p data-start=\"14024\" data-end=\"14160\">Built-in email validation and list hygiene tools, reducing the risk of bounces and spam traps. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/wp-content\/uploads\/pdf\/EN_-_MJ_-_Road_to_Inbox_-_2025_-_v1_3.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"14161\" data-end=\"14315\">\n<p data-start=\"14163\" data-end=\"14315\">Pre-blocking of high-risk or suspicious emails, helping preserve deliverability and avoid spam-related errors. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/documentation.mailjet.com\/hc\/en-us\/articles\/360048398994-Email-statuses-all-metrics-explained?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"14316\" data-end=\"14497\">\n<p data-start=\"14318\" data-end=\"14497\">Real-time analytics, click maps, bounce\/spam\/unsubscribe tracking, campaign comparison \u2014 enabling continuous monitoring and optimization. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/products\/email-marketing\/tracking-tools\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">EmailTooltester.com<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"14498\" data-end=\"14713\">\n<p data-start=\"14500\" data-end=\"14713\">Strong support for clean, responsive email design \u2014 ensuring good user experience across clients and reducing the risk of rendering issues that might trigger spam filters. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"14715\" data-end=\"14744\"><span class=\"ez-toc-section\" id=\"Limitations_Critiques\"><\/span>Limitations &amp; Critiques<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"14746\" data-end=\"15005\">However, some reviewers note that Mailjet lacks a <strong data-start=\"14796\" data-end=\"14845\">specialized deliverability score or dashboard<\/strong> \u2014 meaning advanced senders may not get a single \u201cdeliverability health metric\u201d to quickly assess overall performance. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.emailtooltester.com\/en\/reviews\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">EmailTooltester.com<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<p data-start=\"15007\" data-end=\"15525\">Further, while Mailjet provides many tools and guidance, deliverability ultimately depends heavily on sender behavior (list practices, content, engagement, domain warming, etc.). A platform can provide the tools \u2014 but misuse (e.g. large blasts to unengaged lists, poor content) will still harm deliverability. Several users on public forums report occasional deliverability issues when using Mailjet \u2014 especially early on, or when sending to Gmail, Outlook, or other major mailbox providers. For example (on Reddit):<\/p>\n<blockquote data-start=\"15527\" data-end=\"15712\">\n<p data-start=\"15529\" data-end=\"15712\">\u201c\u2026 when I first integrated the system \u2026 I am now unable to send ANY emails and they are all coming back as \u2018Blocked\u2019 and \u2026 \u2018Spam Preblocked\u2019\u201d <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.reddit.com\/\/r\/email\/comments\/gd37l2?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Reddit<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/blockquote>\n<p data-start=\"15714\" data-end=\"15913\">These anecdotal reports highlight that even with a capable ESP such as Mailjet, achieving consistent deliverability \u2014 especially during domain\/IP warm-up, or with new domains \u2014 remains challenging.<\/p>\n<p data-start=\"15915\" data-end=\"16081\">Thus, while Mailjet gives the tools, success depends on responsible sending, adherence to best practices, ongoing list maintenance, and gradual reputation building.<\/p>\n<h2 data-start=\"16088\" data-end=\"16161\"><span class=\"ez-toc-section\" id=\"Why_This_Evolution_Matters_%E2%80%94_Broader_Context_of_Email_Deliverability\"><\/span>Why This Evolution Matters \u2014 Broader Context of Email Deliverability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"16163\" data-end=\"16331\">The evolution of Mailjet\u2019s deliverability features mirrors broader shifts in email marketing and inbox provider policies. A few reasons this evolution is significant:<\/p>\n<ul data-start=\"16333\" data-end=\"17600\">\n<li data-start=\"16333\" data-end=\"16710\">\n<p data-start=\"16335\" data-end=\"16710\"><strong data-start=\"16335\" data-end=\"16378\">Mailbox providers have gotten stricter.<\/strong> As spam, phishing, spoofing, and unsolicited marketing grow, providers like Gmail, Yahoo, Microsoft, Apple Mail have ramped up authentication and spam-filtering requirements. This pushes ESPs to support SPF, DKIM, DMARC, list-unsubscribe headers, feedback loops, better analytics, etc. Mailjet\u2019s evolution aligns with this shift.<\/p>\n<\/li>\n<li data-start=\"16711\" data-end=\"16989\">\n<p data-start=\"16713\" data-end=\"16989\"><strong data-start=\"16713\" data-end=\"16762\">Deliverability now equals trust &amp; reputation.<\/strong> It\u2019s no longer enough to just \u201csend.\u201d Senders must build a consistent track record, maintain good list hygiene, avoid spam triggers, respect recipients, and build engagement. Mailjet\u2019s deliverability tools help achieve that.<\/p>\n<\/li>\n<li data-start=\"16990\" data-end=\"17275\">\n<p data-start=\"16992\" data-end=\"17275\"><strong data-start=\"16992\" data-end=\"17043\">Deliverability as a competitive differentiator.<\/strong> For businesses, being confident their emails reach inboxes \u2014 whether marketing newsletters or crucial transactional messages \u2014 is a core value. ESPs like Mailjet compete not just on ease-of-use, but on deliverability performance.<\/p>\n<\/li>\n<li data-start=\"17276\" data-end=\"17600\">\n<p data-start=\"17278\" data-end=\"17600\"><strong data-start=\"17278\" data-end=\"17327\">Balancing technical complexity and usability.<\/strong> Many authentication and deliverability best practices require technical knowledge. Mailjet\u2019s drag-and-drop editors, built-in validation, and user-friendly guides lower the barrier \u2014 enabling marketers without deep technical skills to still meet deliverability standards.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"17602\" data-end=\"17833\">Especially for growing businesses, or those operating internationally (like you \u2014 given you\u2019re in Nigeria but may have global clients), using an ESP with strong deliverability infrastructure and compliance features matters a lot.<\/p>\n<h2 data-start=\"17840\" data-end=\"17924\"><span class=\"ez-toc-section\" id=\"Whats_Next_%E2%80%94_Deliverability_in_2025_and_Beyond_and_How_Mailjet_is_Positioning\"><\/span>What\u2019s Next \u2014 Deliverability in 2025 and Beyond, and How Mailjet is Positioning<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"17926\" data-end=\"18064\">Looking at recent updates and the 2025 \u201croad to inbox\u201d documentation from Mailjet, a few trends and future-oriented capabilities emerge:<\/p>\n<ol data-start=\"18066\" data-end=\"19691\">\n<li data-start=\"18066\" data-end=\"18373\">\n<p data-start=\"18069\" data-end=\"18373\"><strong data-start=\"18069\" data-end=\"18115\">Email-validation will become more central.<\/strong> As bounce rates and invalid addresses remain a key risk, built-in validation (or integration with validation services) will continue to be emphasized. Mailjet already offers monthly validation quotas for paid plans. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/wp-content\/uploads\/pdf\/EN_-_MJ_-_Road_to_Inbox_-_2025_-_v1_3.pdf?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"18374\" data-end=\"18680\">\n<p data-start=\"18377\" data-end=\"18680\"><strong data-start=\"18377\" data-end=\"18453\">Greater automation, segmentation, personalization \u2014 to drive engagement.<\/strong> Engagement (opens, clicks) increasingly matters for sender reputation. Mailjet\u2019s support for segmentation, dynamic content, and personalized campaigns will likely become more valuable. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"18681\" data-end=\"18962\">\n<p data-start=\"18684\" data-end=\"18962\"><strong data-start=\"18684\" data-end=\"18724\">More compliance &amp; security features.<\/strong> As regulations and user expectations for privacy (e.g. GDPR), security, and consent grow, platforms like Mailjet \u2014 which already tout GDPR compliance and certifications \u2014 will need to stay ahead. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/launcheurope.eu\/en\/business\/products\/digital\/mailjet\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Launch Europe<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li data-start=\"18963\" data-end=\"19294\">\n<p data-start=\"18966\" data-end=\"19294\"><strong data-start=\"18966\" data-end=\"19054\">Deliverability intelligence and analytics \u2014 possibly dedicated dashboards or scores.<\/strong> Although Mailjet currently lacks a single \u201cdeliverability score,\u201d industry demand suggests that ESPs might offer explicit deliverability health dashboards. Mailjet\u2019s analytics and feedback-tracking are good foundations for such features.<\/p>\n<\/li>\n<li data-start=\"19295\" data-end=\"19691\">\n<p data-start=\"19298\" data-end=\"19691\"><strong data-start=\"19298\" data-end=\"19352\">Seamless domain\/IP management for scaling senders.<\/strong> As businesses scale globally and send large volumes of email (marketing + transactional), having flexible infrastructure (IP rotation, multiple sending domains, subdomains, stream separation) will be vital. Mailjet\u2019s dedicated IP offering and stream separation support suggest readiness for that. <span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem] animate-[show_150ms_ease-in]\" data-testid=\"webpage-citation-pill\"><a class=\"flex h-4.5 overflow-hidden rounded-xl px-2 text-[9px] font-medium transition-colors duration-150 ease-in-out text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.mailjet.com\/road-to-inbox\/chapter\/technical-email-deliverability\/?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative start-0 bottom-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-[15ch] grow truncate overflow-hidden text-center\">Mailjet<\/span><span class=\"-me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ol>\n<p data-start=\"19693\" data-end=\"19799\">Thus, Mailjet appears well-positioned to meet both current deliverability challenges and future demands.<\/p>\n<h2 data-start=\"19806\" data-end=\"19882\"><span class=\"ez-toc-section\" id=\"Lessons_Learned_%E2%80%94_What_Mailjets_Evolution_Teaches_About_Deliverability\"><\/span>Lessons Learned \u2014 What Mailjet\u2019s Evolution Teaches About Deliverability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"19884\" data-end=\"20005\">From Mailjet\u2019s journey, a few key lessons emerge \u2014 applicable to any business or sender who cares about deliverability:<\/p>\n<ul data-start=\"20007\" data-end=\"21212\">\n<li data-start=\"20007\" data-end=\"20136\">\n<p data-start=\"20009\" data-end=\"20136\"><strong data-start=\"20009\" data-end=\"20056\">Technical authentication is non-negotiable.<\/strong> SPF, DKIM, DMARC \u2014 these are baseline necessities today, not optional extras.<\/p>\n<\/li>\n<li data-start=\"20137\" data-end=\"20343\">\n<p data-start=\"20139\" data-end=\"20343\"><strong data-start=\"20139\" data-end=\"20166\">Infrastructure matters.<\/strong> Shared IPs may be fine for small senders or occasional newsletters \u2014 but serious marketers should consider dedicated IPs and domain separation for predictable deliverability.<\/p>\n<\/li>\n<li data-start=\"20344\" data-end=\"20537\">\n<p data-start=\"20346\" data-end=\"20537\"><strong data-start=\"20346\" data-end=\"20391\">List hygiene and validation is essential.<\/strong> Clean lists (no invalid addresses, no purchased or scraped contacts, no role emails) preserve reputation, reduce bounces, and avoid spam traps.<\/p>\n<\/li>\n<li data-start=\"20538\" data-end=\"20768\">\n<p data-start=\"20540\" data-end=\"20768\"><strong data-start=\"20540\" data-end=\"20575\">Content &amp; context still matter.<\/strong> Even technically perfect mail can end up filtered out if content is spammy, poorly coded, or irrelevant. Best practices in design, formatting, personalization, and engagement remain crucial.<\/p>\n<\/li>\n<li data-start=\"20769\" data-end=\"20955\">\n<p data-start=\"20771\" data-end=\"20955\"><strong data-start=\"20771\" data-end=\"20827\">Monitoring &amp; feedback loops help catch issues early.<\/strong> Analytics, bounce\/spam tracking, unsubscribe handling, pre-blocking \u2014 these help detect trouble before reputation is damaged.<\/p>\n<\/li>\n<li data-start=\"20956\" data-end=\"21212\">\n<p data-start=\"20958\" data-end=\"21212\"><strong data-start=\"20958\" data-end=\"21016\">Deliverability is not a one-time setup \u2014 it&#8217;s ongoing.<\/strong> As senders scale or change practices (e.g. more volume, different types of emails), they must adapt: warm up IPs, maintain list quality, monitor engagement, separate streams, test content, etc.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"21214\" data-end=\"21402\">Mailjet\u2019s evolution embodies these lessons \u2014 by building tools and guidance to support them, and by giving senders a platform to manage deliverability proactively rather than reactively.<\/p>\n<h1 data-start=\"284\" data-end=\"353\"><span class=\"ez-toc-section\" id=\"Understanding_Deliverability_Core_Concepts_Relevant_to_Mailjet\"><\/span><strong data-start=\"286\" data-end=\"353\">Understanding Deliverability: Core Concepts Relevant to Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"355\" data-end=\"746\">Email remains one of the most powerful and cost-effective communication channels available to businesses. Whether the goal is marketing, transactional communication, or nurturing long-term customer relationships, email serves as a scalable, measurable, and flexible tool. But email\u2019s impact depends on a foundational concept that is often misunderstood or underestimated: <strong data-start=\"727\" data-end=\"745\">deliverability<\/strong>.<\/p>\n<p data-start=\"748\" data-end=\"1161\">Deliverability refers to the ability of an email to reach the intended recipient\u2019s <strong data-start=\"831\" data-end=\"840\">inbox<\/strong>, not merely the ability to leave the sender\u2019s server. Sending an email and delivering an email are not the same. With increasingly vigilant spam filters, complex authentication systems, and evolving sender reputation algorithms, achieving strong deliverability requires both technical groundwork and strategic messaging.<\/p>\n<p data-start=\"1163\" data-end=\"1543\">For organizations using Mailjet\u2014an email marketing and transactional email platform\u2014understanding deliverability is essential not only for maximizing ROI but also for maintaining long-term sender reputation and compliance. This article provides a comprehensive look at deliverability, with special emphasis on the concepts, practices, and mechanics most relevant to Mailjet users.<\/p>\n<h2 data-start=\"1550\" data-end=\"1592\"><span class=\"ez-toc-section\" id=\"1_What_Deliverability_Really_Means\"><\/span><strong data-start=\"1553\" data-end=\"1592\">1. What Deliverability Really Means<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1594\" data-end=\"1678\">Deliverability is often confused with delivery rate. The distinction is fundamental:<\/p>\n<ul data-start=\"1680\" data-end=\"1950\">\n<li data-start=\"1680\" data-end=\"1809\">\n<p data-start=\"1682\" data-end=\"1809\"><strong data-start=\"1682\" data-end=\"1699\">Delivery rate<\/strong> measures the percentage of emails that successfully reach the recipient\u2019s mail server (e.g., Gmail, Outlook).<\/p>\n<\/li>\n<li data-start=\"1810\" data-end=\"1950\">\n<p data-start=\"1812\" data-end=\"1950\"><strong data-start=\"1812\" data-end=\"1830\">Deliverability<\/strong>, on the other hand, measures whether those delivered emails land in the <strong data-start=\"1903\" data-end=\"1912\">inbox<\/strong>, rather than the spam or junk folder.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1952\" data-end=\"2239\">A campaign may boast a 99% delivery rate while only 70% of those emails reach the actual inbox. Deliverability is influenced by a wide range of factors: authentication, sender reputation, list quality, content, behavior of recipients, and even how frequently they engage with the emails.<\/p>\n<p data-start=\"2241\" data-end=\"2419\">Mailjet provides tools such as real-time statistics, deliverability scoring, and logs that help diagnose inbox placement issues, but mastering the underlying concepts is crucial.<\/p>\n<h2 data-start=\"2426\" data-end=\"2491\"><span class=\"ez-toc-section\" id=\"2_The_Inbox_Landscape_How_Email_Providers_Make_Decisions\"><\/span><strong data-start=\"2429\" data-end=\"2491\">2. The Inbox Landscape: How Email Providers Make Decisions<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2493\" data-end=\"2714\">Modern inbox providers (Gmail, Yahoo, Outlook, and corporate mail systems) use highly advanced algorithms to evaluate incoming mail. These systems incorporate machine learning, pattern recognition, and behavioral signals.<\/p>\n<p data-start=\"2716\" data-end=\"2742\">Important factors include:<\/p>\n<h3 data-start=\"2744\" data-end=\"2774\"><span class=\"ez-toc-section\" id=\"Authentication_Signals\"><\/span><strong data-start=\"2748\" data-end=\"2774\">Authentication Signals<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2775\" data-end=\"2855\">Inbox providers use protocols such as SPF, DKIM, and DMARC to determine whether:<\/p>\n<ul data-start=\"2857\" data-end=\"2987\">\n<li data-start=\"2857\" data-end=\"2902\">\n<p data-start=\"2859\" data-end=\"2902\">the email is sent from a legitimate server,<\/p>\n<\/li>\n<li data-start=\"2903\" data-end=\"2943\">\n<p data-start=\"2905\" data-end=\"2943\">the content is tampered with en route,<\/p>\n<\/li>\n<li data-start=\"2944\" data-end=\"2987\">\n<p data-start=\"2946\" data-end=\"2987\">the domain is protected against spoofing.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2989\" data-end=\"3098\">Without these signals, an email\u2014even one containing legitimate content\u2014appears risky to the receiving server.<\/p>\n<h3 data-start=\"3100\" data-end=\"3125\"><span class=\"ez-toc-section\" id=\"Sender_Reputation\"><\/span><strong data-start=\"3104\" data-end=\"3125\">Sender Reputation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3126\" data-end=\"3215\">Sender reputation functions like a credit score for email. It\u2019s built over time based on:<\/p>\n<ul data-start=\"3217\" data-end=\"3341\">\n<li data-start=\"3217\" data-end=\"3233\">\n<p data-start=\"3219\" data-end=\"3233\">bounce rates<\/p>\n<\/li>\n<li data-start=\"3234\" data-end=\"3253\">\n<p data-start=\"3236\" data-end=\"3253\">spam complaints<\/p>\n<\/li>\n<li data-start=\"3254\" data-end=\"3277\">\n<p data-start=\"3256\" data-end=\"3277\">sending consistency<\/p>\n<\/li>\n<li data-start=\"3278\" data-end=\"3297\">\n<p data-start=\"3280\" data-end=\"3297\">user engagement<\/p>\n<\/li>\n<li data-start=\"3298\" data-end=\"3314\">\n<p data-start=\"3300\" data-end=\"3314\">list hygiene<\/p>\n<\/li>\n<li data-start=\"3315\" data-end=\"3341\">\n<p data-start=\"3317\" data-end=\"3341\">domain age and history<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3343\" data-end=\"3480\">Just like credit scores, reputations can improve or degrade depending on behavior, and recovering from a negative reputation can be slow.<\/p>\n<h3 data-start=\"3482\" data-end=\"3508\"><span class=\"ez-toc-section\" id=\"Engagement_Signals\"><\/span><strong data-start=\"3486\" data-end=\"3508\">Engagement Signals<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3509\" data-end=\"3616\">Modern inbox providers heavily prioritize engagement. They look at how recipients interact with your email:<\/p>\n<ul data-start=\"3618\" data-end=\"3732\">\n<li data-start=\"3618\" data-end=\"3627\">\n<p data-start=\"3620\" data-end=\"3627\">Opens<\/p>\n<\/li>\n<li data-start=\"3628\" data-end=\"3638\">\n<p data-start=\"3630\" data-end=\"3638\">Clicks<\/p>\n<\/li>\n<li data-start=\"3639\" data-end=\"3650\">\n<p data-start=\"3641\" data-end=\"3650\">Replies<\/p>\n<\/li>\n<li data-start=\"3651\" data-end=\"3682\">\n<p data-start=\"3653\" data-end=\"3682\">Moves to inbox (\u201cnot spam\u201d)<\/p>\n<\/li>\n<li data-start=\"3683\" data-end=\"3712\">\n<p data-start=\"3685\" data-end=\"3712\">Deletions without reading<\/p>\n<\/li>\n<li data-start=\"3713\" data-end=\"3732\">\n<p data-start=\"3715\" data-end=\"3732\">Marking as spam<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3734\" data-end=\"3926\">High engagement signals trustworthiness, boosting inbox placement. Declining engagement can cause your messages to slide into spam\u2014even if the content and authentication are technically sound.<\/p>\n<h3 data-start=\"3928\" data-end=\"3956\"><span class=\"ez-toc-section\" id=\"Content_and_Patterns\"><\/span><strong data-start=\"3932\" data-end=\"3956\">Content and Patterns<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3957\" data-end=\"3977\">Algorithms evaluate:<\/p>\n<ul data-start=\"3979\" data-end=\"4133\">\n<li data-start=\"3979\" data-end=\"4001\">\n<p data-start=\"3981\" data-end=\"4001\">spam-like phrasing<\/p>\n<\/li>\n<li data-start=\"4002\" data-end=\"4022\">\n<p data-start=\"4004\" data-end=\"4022\">attachment types<\/p>\n<\/li>\n<li data-start=\"4023\" data-end=\"4057\">\n<p data-start=\"4025\" data-end=\"4057\">excessive image-to-text ratios<\/p>\n<\/li>\n<li data-start=\"4058\" data-end=\"4074\">\n<p data-start=\"4060\" data-end=\"4074\">URL patterns<\/p>\n<\/li>\n<li data-start=\"4075\" data-end=\"4105\">\n<p data-start=\"4077\" data-end=\"4105\">domain reputation of links<\/p>\n<\/li>\n<li data-start=\"4106\" data-end=\"4133\">\n<p data-start=\"4108\" data-end=\"4133\">message personalization<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4135\" data-end=\"4197\">Content matters, but much less than reputation and engagement.<\/p>\n<p data-start=\"4199\" data-end=\"4325\">Mailjet\u2019s Spam Assassin score, template builder, and pre-send validation tools help ensure content aligns with best practices.<\/p>\n<h2 data-start=\"4332\" data-end=\"4390\"><span class=\"ez-toc-section\" id=\"3_Authentication_The_Foundation_of_Deliverability\"><\/span><strong data-start=\"4335\" data-end=\"4390\">3. Authentication: The Foundation of Deliverability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4392\" data-end=\"4530\">Authentication is the backbone of any deliverability strategy. Mailjet strongly recommends configuring all major authentication protocols.<\/p>\n<h3 data-start=\"4532\" data-end=\"4569\"><span class=\"ez-toc-section\" id=\"SPF_Sender_Policy_Framework\"><\/span><strong data-start=\"4536\" data-end=\"4569\">SPF (Sender Policy Framework)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4570\" data-end=\"4661\">SPF verifies that Mailjet\u2019s servers are authorized to send emails on behalf of your domain.<\/p>\n<p data-start=\"4663\" data-end=\"4674\">Key points:<\/p>\n<ul data-start=\"4675\" data-end=\"4834\">\n<li data-start=\"4675\" data-end=\"4712\">\n<p data-start=\"4677\" data-end=\"4712\">SPF is defined in the domain\u2019s DNS.<\/p>\n<\/li>\n<li data-start=\"4713\" data-end=\"4749\">\n<p data-start=\"4715\" data-end=\"4749\">It prevents spoofing and phishing.<\/p>\n<\/li>\n<li data-start=\"4750\" data-end=\"4834\">\n<p data-start=\"4752\" data-end=\"4834\">A correct SPF record reduces the chance of soft bounces and spam folder placement.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4836\" data-end=\"4929\">Mailjet provides a custom SPF entry that users must add to their DNS to authenticate sending.<\/p>\n<h3 data-start=\"4931\" data-end=\"4972\"><span class=\"ez-toc-section\" id=\"DKIM_DomainKeys_Identified_Mail\"><\/span><strong data-start=\"4935\" data-end=\"4972\">DKIM (DomainKeys Identified Mail)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4973\" data-end=\"5025\">DKIM attaches a digital signature to outgoing email.<\/p>\n<p data-start=\"5027\" data-end=\"5044\">Benefits include:<\/p>\n<ul data-start=\"5045\" data-end=\"5179\">\n<li data-start=\"5045\" data-end=\"5081\">\n<p data-start=\"5047\" data-end=\"5081\">Verifies legitimacy of the sender.<\/p>\n<\/li>\n<li data-start=\"5082\" data-end=\"5126\">\n<p data-start=\"5084\" data-end=\"5126\">Ensures email content hasn\u2019t been altered.<\/p>\n<\/li>\n<li data-start=\"5127\" data-end=\"5179\">\n<p data-start=\"5129\" data-end=\"5179\">Provides a strong trust signal to inbox providers.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5181\" data-end=\"5298\">In Mailjet, users generate a DKIM key and add it to DNS. Mailjet then signs all outgoing mail on the domain\u2019s behalf.<\/p>\n<h3 data-start=\"5300\" data-end=\"5376\"><span class=\"ez-toc-section\" id=\"DMARC_Domain-based_Message_Authentication_Reporting_Conformance\"><\/span><strong data-start=\"5304\" data-end=\"5376\">DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5377\" data-end=\"5439\">DMARC builds on SPF and DKIM to provide additional protection.<\/p>\n<p data-start=\"5441\" data-end=\"5469\">It allows a domain owner to:<\/p>\n<ul data-start=\"5470\" data-end=\"5632\">\n<li data-start=\"5470\" data-end=\"5525\">\n<p data-start=\"5472\" data-end=\"5525\">indicate which authentication methods should be used,<\/p>\n<\/li>\n<li data-start=\"5526\" data-end=\"5586\">\n<p data-start=\"5528\" data-end=\"5586\">instruct inbox providers on how to treat failing messages,<\/p>\n<\/li>\n<li data-start=\"5587\" data-end=\"5632\">\n<p data-start=\"5589\" data-end=\"5632\">receive reports on authentication activity.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5634\" data-end=\"5745\">DMARC helps protect brand reputation and resist phishing attacks. Mailjet fully supports DMARC-aligned sending.<\/p>\n<h3 data-start=\"5747\" data-end=\"5805\"><span class=\"ez-toc-section\" id=\"Brand_Indicators_for_Message_Identification_BIMI\"><\/span><strong data-start=\"5751\" data-end=\"5805\">Brand Indicators for Message Identification (BIMI)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5806\" data-end=\"5993\">Though optional, BIMI allows you to display your brand logo in supported inboxes. It requires strong DMARC enforcement. While not directly improving deliverability, BIMI reinforces trust.<\/p>\n<h2 data-start=\"6000\" data-end=\"6081\"><span class=\"ez-toc-section\" id=\"4_Sending_Reputation_Domain_IP_and_Shared_vs_Dedicated_Infrastructure\"><\/span><strong data-start=\"6003\" data-end=\"6081\">4. Sending Reputation: Domain, IP, and Shared vs. Dedicated Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6083\" data-end=\"6145\">Reputation is built at both the domain level and the IP level.<\/p>\n<h3 data-start=\"6147\" data-end=\"6172\"><span class=\"ez-toc-section\" id=\"Domain_Reputation\"><\/span><strong data-start=\"6151\" data-end=\"6172\">Domain Reputation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6173\" data-end=\"6198\">Domain reputation weighs:<\/p>\n<ul data-start=\"6199\" data-end=\"6347\">\n<li data-start=\"6199\" data-end=\"6230\">\n<p data-start=\"6201\" data-end=\"6230\">how long you\u2019ve been sending,<\/p>\n<\/li>\n<li data-start=\"6231\" data-end=\"6252\">\n<p data-start=\"6233\" data-end=\"6252\">how often you send,<\/p>\n<\/li>\n<li data-start=\"6253\" data-end=\"6291\">\n<p data-start=\"6255\" data-end=\"6291\">your historical engagement patterns,<\/p>\n<\/li>\n<li data-start=\"6292\" data-end=\"6312\">\n<p data-start=\"6294\" data-end=\"6312\">your list quality,<\/p>\n<\/li>\n<li data-start=\"6313\" data-end=\"6347\">\n<p data-start=\"6315\" data-end=\"6347\">your bounce and complaint rates.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6349\" data-end=\"6478\">Domain reputation follows you even if you switch email service providers. It\u2019s the single most important reputation metric today.<\/p>\n<h3 data-start=\"6480\" data-end=\"6501\"><span class=\"ez-toc-section\" id=\"IP_Reputation\"><\/span><strong data-start=\"6484\" data-end=\"6501\">IP Reputation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6502\" data-end=\"6535\">With Mailjet, users may send via:<\/p>\n<ul data-start=\"6536\" data-end=\"6650\">\n<li data-start=\"6536\" data-end=\"6587\">\n<p data-start=\"6538\" data-end=\"6587\"><strong data-start=\"6538\" data-end=\"6557\">Shared IP pools<\/strong> (default for most accounts)<\/p>\n<\/li>\n<li data-start=\"6588\" data-end=\"6650\">\n<p data-start=\"6590\" data-end=\"6650\"><strong data-start=\"6590\" data-end=\"6607\">Dedicated IPs<\/strong> (for higher-volume or specialized senders)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6652\" data-end=\"6849\">Shared IPs benefit smaller senders because the reputation is spread across many, but can be risky if a few senders behave poorly. Mailjet actively monitors shared IP pools to maintain high quality.<\/p>\n<p data-start=\"6851\" data-end=\"6871\">Dedicated IPs offer:<\/p>\n<ul data-start=\"6872\" data-end=\"7061\">\n<li data-start=\"6872\" data-end=\"6908\">\n<p data-start=\"6874\" data-end=\"6908\">Complete control over reputation<\/p>\n<\/li>\n<li data-start=\"6909\" data-end=\"6955\">\n<p data-start=\"6911\" data-end=\"6955\">Better consistency for high-volume senders<\/p>\n<\/li>\n<li data-start=\"6956\" data-end=\"7061\">\n<p data-start=\"6958\" data-end=\"7061\">Needed for DMARC strict alignment, certain inbox certifications, and high-value transactional traffic<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7063\" data-end=\"7205\">However, dedicated IPs require a warm-up period, where sending volume is gradually increased so inbox providers can learn to trust the new IP.<\/p>\n<h2 data-start=\"7212\" data-end=\"7257\"><span class=\"ez-toc-section\" id=\"5_List_Quality_and_Contact_Management\"><\/span><strong data-start=\"7215\" data-end=\"7257\">5. List Quality and Contact Management<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"7259\" data-end=\"7335\">List quality is one of the strongest predictors of long-term deliverability.<\/p>\n<h3 data-start=\"7337\" data-end=\"7369\"><span class=\"ez-toc-section\" id=\"Permission-Based_Sending\"><\/span><strong data-start=\"7341\" data-end=\"7369\">Permission-Based Sending<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7370\" data-end=\"7514\">Mailjet requires explicit opt-in. Purchased lists, scraped lists, or shared lists violate Mailjet\u2019s policies and severely damage deliverability.<\/p>\n<h3 data-start=\"7516\" data-end=\"7537\"><span class=\"ez-toc-section\" id=\"Double_Opt-In\"><\/span><strong data-start=\"7520\" data-end=\"7537\">Double Opt-In<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7538\" data-end=\"7714\">This method requires subscribers to confirm their signup via a link sent to their email. It&#8217;s one of the strongest methods of protecting list quality and reducing hard bounces.<\/p>\n<h3 data-start=\"7716\" data-end=\"7741\"><span class=\"ez-toc-section\" id=\"Bounce_Management\"><\/span><strong data-start=\"7720\" data-end=\"7741\">Bounce Management<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7742\" data-end=\"7771\">Bounces are categorized into:<\/p>\n<ul data-start=\"7772\" data-end=\"7930\">\n<li data-start=\"7772\" data-end=\"7853\">\n<p data-start=\"7774\" data-end=\"7853\"><strong data-start=\"7774\" data-end=\"7790\">Hard bounces<\/strong>: permanent failures (invalid address, domain doesn\u2019t exist).<\/p>\n<\/li>\n<li data-start=\"7854\" data-end=\"7930\">\n<p data-start=\"7856\" data-end=\"7930\"><strong data-start=\"7856\" data-end=\"7872\">Soft bounces<\/strong>: temporary failures (mailbox full, server unavailable).<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7932\" data-end=\"8108\">Excessive bounce rates (&lt;2% recommended) raise red flags for inbox providers. Mailjet automatically manages bounces and blocks problematic addresses to protect your reputation.<\/p>\n<h3 data-start=\"8110\" data-end=\"8133\"><span class=\"ez-toc-section\" id=\"Spam_Complaints\"><\/span><strong data-start=\"8114\" data-end=\"8133\">Spam Complaints<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8134\" data-end=\"8244\">Users can mark your email as spam with one click. A complaint rate above 0.1% (1 per 1,000 emails) is harmful.<\/p>\n<p data-start=\"8246\" data-end=\"8357\">Mailjet\u2019s feedback loop integrations help automatically identify complaining users so they can be unsubscribed.<\/p>\n<h3 data-start=\"8359\" data-end=\"8380\"><span class=\"ez-toc-section\" id=\"List_Cleaning\"><\/span><strong data-start=\"8363\" data-end=\"8380\">List Cleaning<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8381\" data-end=\"8504\">Inactive users should be removed regularly. Tools like segmentation and engagement scoring help identify inactive contacts.<\/p>\n<h2 data-start=\"8511\" data-end=\"8567\"><span class=\"ez-toc-section\" id=\"6_Engagement_The_Heart_of_Modern_Deliverability\"><\/span><strong data-start=\"8514\" data-end=\"8567\">6. Engagement: The Heart of Modern Deliverability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"8569\" data-end=\"8699\">Inbox providers have shifted to engagement-based filtering. Engagement is now as important as authentication, sometimes even more.<\/p>\n<h3 data-start=\"8701\" data-end=\"8736\"><span class=\"ez-toc-section\" id=\"Positive_Engagement_Signals\"><\/span><strong data-start=\"8705\" data-end=\"8736\">Positive Engagement Signals<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"8737\" data-end=\"8814\">\n<li data-start=\"8737\" data-end=\"8752\">\n<p data-start=\"8739\" data-end=\"8752\">Open emails<\/p>\n<\/li>\n<li data-start=\"8753\" data-end=\"8768\">\n<p data-start=\"8755\" data-end=\"8768\">Click links<\/p>\n<\/li>\n<li data-start=\"8769\" data-end=\"8786\">\n<p data-start=\"8771\" data-end=\"8786\">Save or reply<\/p>\n<\/li>\n<li data-start=\"8787\" data-end=\"8814\">\n<p data-start=\"8789\" data-end=\"8814\">Move from spam to inbox<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"8816\" data-end=\"8840\"><span class=\"ez-toc-section\" id=\"Negative_Signals\"><\/span><strong data-start=\"8820\" data-end=\"8840\">Negative Signals<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"8841\" data-end=\"8959\">\n<li data-start=\"8841\" data-end=\"8868\">\n<p data-start=\"8843\" data-end=\"8868\">No engagement over time<\/p>\n<\/li>\n<li data-start=\"8869\" data-end=\"8891\">\n<p data-start=\"8871\" data-end=\"8891\">Immediate deletion<\/p>\n<\/li>\n<li data-start=\"8892\" data-end=\"8911\">\n<p data-start=\"8894\" data-end=\"8911\">Marking as spam<\/p>\n<\/li>\n<li data-start=\"8912\" data-end=\"8959\">\n<p data-start=\"8914\" data-end=\"8959\">Filtering rules created to bypass your mail<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8961\" data-end=\"9067\">Mailjet allows segmentation based on activity (opens, clicks) so you can optimize re-engagement campaigns.<\/p>\n<h3 data-start=\"9069\" data-end=\"9092\"><span class=\"ez-toc-section\" id=\"Personalization\"><\/span><strong data-start=\"9073\" data-end=\"9092\">Personalization<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9093\" data-end=\"9197\">Using first names, dynamic content blocks, and personalized product recommendations increases relevance.<\/p>\n<h3 data-start=\"9199\" data-end=\"9221\"><span class=\"ez-toc-section\" id=\"Send_Frequency\"><\/span><strong data-start=\"9203\" data-end=\"9221\">Send Frequency<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9222\" data-end=\"9369\">Too often, engagement falls due to over-sending, causing fatigue. Too infrequent, and users forget who you are. Finding the right balance is vital.<\/p>\n<h2 data-start=\"9376\" data-end=\"9445\"><span class=\"ez-toc-section\" id=\"7_Content_Structure_Relevance_and_Anti-Spam_Considerations\"><\/span><strong data-start=\"9379\" data-end=\"9445\">7. Content: Structure, Relevance, and Anti-Spam Considerations<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"9447\" data-end=\"9528\">While content alone won\u2019t guarantee inboxing, bad content can definitely harm it.<\/p>\n<h3 data-start=\"9530\" data-end=\"9556\"><span class=\"ez-toc-section\" id=\"Spam_Trigger_Words\"><\/span><strong data-start=\"9534\" data-end=\"9556\">Spam Trigger Words<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9557\" data-end=\"9707\">These may include overly promotional phrasing, misleading subject lines, or sensational language. Context matters more than individual words, however.<\/p>\n<h3 data-start=\"9709\" data-end=\"9736\"><span class=\"ez-toc-section\" id=\"HTML_Best_Practices\"><\/span><strong data-start=\"9713\" data-end=\"9736\">HTML Best Practices<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"9737\" data-end=\"9839\">\n<li data-start=\"9737\" data-end=\"9763\">\n<p data-start=\"9739\" data-end=\"9763\">Clean, responsive HTML<\/p>\n<\/li>\n<li data-start=\"9764\" data-end=\"9790\">\n<p data-start=\"9766\" data-end=\"9790\">Avoid excessive images<\/p>\n<\/li>\n<li data-start=\"9791\" data-end=\"9811\">\n<p data-start=\"9793\" data-end=\"9811\">Include alt text<\/p>\n<\/li>\n<li data-start=\"9812\" data-end=\"9839\">\n<p data-start=\"9814\" data-end=\"9839\">Limit large attachments<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"9841\" data-end=\"9926\">Mailjet\u2019s drag-and-drop editor ensures clean code, avoiding hidden formatting issues.<\/p>\n<h3 data-start=\"9928\" data-end=\"9955\"><span class=\"ez-toc-section\" id=\"Text-to-Image_Ratio\"><\/span><strong data-start=\"9932\" data-end=\"9955\">Text-to-Image Ratio<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9956\" data-end=\"10043\">Emails composed almost entirely of images without accompanying text often land in spam.<\/p>\n<h3 data-start=\"10045\" data-end=\"10080\"><span class=\"ez-toc-section\" id=\"Clear_Unsubscribe_Mechanism\"><\/span><strong data-start=\"10049\" data-end=\"10080\">Clear Unsubscribe Mechanism<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10081\" data-end=\"10164\">Required by law (GDPR, CAN-SPAM). Making unsubscribes easy reduces spam complaints.<\/p>\n<h2 data-start=\"10171\" data-end=\"10213\"><span class=\"ez-toc-section\" id=\"8_Sending_Practices_and_Throttling\"><\/span><strong data-start=\"10174\" data-end=\"10213\">8. Sending Practices and Throttling<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"10215\" data-end=\"10250\"><span class=\"ez-toc-section\" id=\"Consistent_Sending_Patterns\"><\/span><strong data-start=\"10219\" data-end=\"10250\">Consistent Sending Patterns<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10251\" data-end=\"10315\">Sudden spikes in volume look suspicious. Build volume gradually.<\/p>\n<h3 data-start=\"10317\" data-end=\"10356\"><span class=\"ez-toc-section\" id=\"Warm-Up_for_New_Domains_and_IPs\"><\/span><strong data-start=\"10321\" data-end=\"10356\">Warm-Up for New Domains and IPs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10357\" data-end=\"10436\">If you\u2019re using Mailjet with a new domain or dedicated IP, you must slow-start:<\/p>\n<ol data-start=\"10438\" data-end=\"10592\">\n<li data-start=\"10438\" data-end=\"10484\">\n<p data-start=\"10441\" data-end=\"10484\">Start with your most engaged subscribers.<\/p>\n<\/li>\n<li data-start=\"10485\" data-end=\"10543\">\n<p data-start=\"10488\" data-end=\"10543\">Send small volumes (a few hundred to a few thousand).<\/p>\n<\/li>\n<li data-start=\"10544\" data-end=\"10592\">\n<p data-start=\"10547\" data-end=\"10592\">Increase volume daily based on performance.<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"10594\" data-end=\"10626\"><span class=\"ez-toc-section\" id=\"Segmenting_by_Engagement\"><\/span><strong data-start=\"10598\" data-end=\"10626\">Segmenting by Engagement<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10627\" data-end=\"10694\">Send more frequently to active users; less often to inactive users.<\/p>\n<h3 data-start=\"10696\" data-end=\"10723\"><span class=\"ez-toc-section\" id=\"Avoiding_Spam_Traps\"><\/span><strong data-start=\"10700\" data-end=\"10723\">Avoiding Spam Traps<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10724\" data-end=\"10824\">Spam traps are email addresses used by inbox providers to detect spammers. They come in three forms:<\/p>\n<ul data-start=\"10826\" data-end=\"10976\">\n<li data-start=\"10826\" data-end=\"10879\">\n<p data-start=\"10828\" data-end=\"10879\"><strong data-start=\"10828\" data-end=\"10846\">Pristine traps<\/strong> (never owned by a real person)<\/p>\n<\/li>\n<li data-start=\"10880\" data-end=\"10927\">\n<p data-start=\"10882\" data-end=\"10927\"><strong data-start=\"10882\" data-end=\"10900\">Recycled traps<\/strong> (old abandoned accounts)<\/p>\n<\/li>\n<li data-start=\"10928\" data-end=\"10976\">\n<p data-start=\"10930\" data-end=\"10976\"><strong data-start=\"10930\" data-end=\"10944\">Typo traps<\/strong> (misspellings like gmall.com)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10978\" data-end=\"11027\">Strong list hygiene prevents hitting these traps.<\/p>\n<h2 data-start=\"11034\" data-end=\"11082\"><span class=\"ez-toc-section\" id=\"9_Monitoring_Deliverability_with_Mailjet\"><\/span><strong data-start=\"11037\" data-end=\"11082\">9. Monitoring Deliverability with Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"11084\" data-end=\"11154\">Mailjet provides rich analytics to help monitor deliverability health:<\/p>\n<h3 data-start=\"11156\" data-end=\"11175\"><span class=\"ez-toc-section\" id=\"Key_Metrics\"><\/span><strong data-start=\"11160\" data-end=\"11175\">Key Metrics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"11176\" data-end=\"11270\">\n<li data-start=\"11176\" data-end=\"11193\">\n<p data-start=\"11178\" data-end=\"11193\">Delivery rate<\/p>\n<\/li>\n<li data-start=\"11194\" data-end=\"11207\">\n<p data-start=\"11196\" data-end=\"11207\">Open rate<\/p>\n<\/li>\n<li data-start=\"11208\" data-end=\"11230\">\n<p data-start=\"11210\" data-end=\"11230\">Click-through rate<\/p>\n<\/li>\n<li data-start=\"11231\" data-end=\"11246\">\n<p data-start=\"11233\" data-end=\"11246\">Bounce rate<\/p>\n<\/li>\n<li data-start=\"11247\" data-end=\"11270\">\n<p data-start=\"11249\" data-end=\"11270\">Spam complaint rate<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"11272\" data-end=\"11294\"><span class=\"ez-toc-section\" id=\"Event_Tracking\"><\/span><strong data-start=\"11276\" data-end=\"11294\">Event Tracking<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11295\" data-end=\"11379\">Mailjet&#8217;s event API and logs show detailed information about each message&#8217;s journey.<\/p>\n<h3 data-start=\"11381\" data-end=\"11433\"><span class=\"ez-toc-section\" id=\"Deliverability_Dashboard_for_Premium_Plans\"><\/span><strong data-start=\"11385\" data-end=\"11433\">Deliverability Dashboard (for Premium Plans)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11434\" data-end=\"11518\">Offers deeper insights, including detailed bounce reasons and reputation indicators.<\/p>\n<h3 data-start=\"11520\" data-end=\"11539\"><span class=\"ez-toc-section\" id=\"AB_Testing\"><\/span><strong data-start=\"11524\" data-end=\"11539\">A\/B Testing<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11540\" data-end=\"11588\">Helps refine subject lines, content, and timing.<\/p>\n<h3 data-start=\"11590\" data-end=\"11617\"><span class=\"ez-toc-section\" id=\"Spam_Score_Analysis\"><\/span><strong data-start=\"11594\" data-end=\"11617\">Spam Score Analysis<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11618\" data-end=\"11688\">Mailjet integrates spam scoring tools to evaluate risk before sending.<\/p>\n<h2 data-start=\"11695\" data-end=\"11739\"><span class=\"ez-toc-section\" id=\"10_Compliance_and_Legal_Requirements\"><\/span><strong data-start=\"11698\" data-end=\"11739\">10. Compliance and Legal Requirements<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"11741\" data-end=\"11787\">Deliverability and compliance go hand-in-hand.<\/p>\n<h3 data-start=\"11789\" data-end=\"11801\"><span class=\"ez-toc-section\" id=\"GDPR\"><\/span><strong data-start=\"11793\" data-end=\"11801\">GDPR<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11802\" data-end=\"11873\">Requires explicit consent for EU contacts and mandates data protection.<\/p>\n<h3 data-start=\"11875\" data-end=\"11891\"><span class=\"ez-toc-section\" id=\"CAN-SPAM\"><\/span><strong data-start=\"11879\" data-end=\"11891\">CAN-SPAM<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11892\" data-end=\"11901\">Requires:<\/p>\n<ul data-start=\"11902\" data-end=\"11991\">\n<li data-start=\"11902\" data-end=\"11930\">\n<p data-start=\"11904\" data-end=\"11930\">physical mailing address<\/p>\n<\/li>\n<li data-start=\"11931\" data-end=\"11961\">\n<p data-start=\"11933\" data-end=\"11961\">no deceptive subject lines<\/p>\n<\/li>\n<li data-start=\"11962\" data-end=\"11991\">\n<p data-start=\"11964\" data-end=\"11991\">clear unsubscribe options<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"11993\" data-end=\"12014\"><span class=\"ez-toc-section\" id=\"CASL_Canada\"><\/span><strong data-start=\"11997\" data-end=\"12014\">CASL (Canada)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12015\" data-end=\"12063\">Stricter than CAN-SPAM\u2014requires express consent.<\/p>\n<p data-start=\"12065\" data-end=\"12196\">Mailjet is built with compliance in mind, offering automated subscription forms, consent management, and easy unsubscribe handling.<\/p>\n<h1 data-start=\"214\" data-end=\"278\"><span class=\"ez-toc-section\" id=\"Mailjet_Infrastructure_Architecture_for_Deliverability\"><\/span><strong data-start=\"216\" data-end=\"276\">Mailjet Infrastructure &amp; Architecture for Deliverability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"296\" data-end=\"757\">Email deliverability\u2014the ability of messages to successfully reach the inbox rather than being blocked or relegated to spam\u2014is a multidimensional challenge involving technical infrastructure, authentication standards, volume management, ISP relationships, data security, and continuous optimization. Mailjet, as a cloud-based email service provider (ESP), has built its platform on a robust and flexible architecture precisely to meet these challenges at scale.<\/p>\n<p data-start=\"759\" data-end=\"1162\">This document provides an in-depth examination of Mailjet\u2019s infrastructure and architectural principles that support high deliverability. While specific internal implementations may evolve over time, the core design philosophy and system components described here represent the known and overarching approach that Mailjet employs to ensure reliable and trustworthy email transmission for global senders.<\/p>\n<h2 data-start=\"1169\" data-end=\"1238\"><span class=\"ez-toc-section\" id=\"1_Overview_of_Mailjets_Deliverability-Focused_Infrastructure\"><\/span><strong data-start=\"1172\" data-end=\"1238\">1. Overview of Mailjet\u2019s Deliverability-Focused Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1240\" data-end=\"1358\">At its core, Mailjet operates a globally distributed, cloud-native infrastructure designed around four key principles:<\/p>\n<ol data-start=\"1360\" data-end=\"1954\">\n<li data-start=\"1360\" data-end=\"1475\">\n<p data-start=\"1363\" data-end=\"1475\"><strong data-start=\"1363\" data-end=\"1402\">Redundancy &amp; High Availability (HA)<\/strong><br data-start=\"1402\" data-end=\"1405\" \/>Ensuring that email services run continuously without interruption.<\/p>\n<\/li>\n<li data-start=\"1477\" data-end=\"1623\">\n<p data-start=\"1480\" data-end=\"1623\"><strong data-start=\"1480\" data-end=\"1509\">Performance &amp; Scalability<\/strong><br data-start=\"1509\" data-end=\"1512\" \/>Allowing the platform to handle large spikes in sending volume, such as during holidays or product launches.<\/p>\n<\/li>\n<li data-start=\"1625\" data-end=\"1775\">\n<p data-start=\"1628\" data-end=\"1775\"><strong data-start=\"1628\" data-end=\"1653\">Security &amp; Compliance<\/strong><br data-start=\"1653\" data-end=\"1656\" \/>Maintaining data protection and adherence to regulations such as GDPR, ISO certifications, and anti-spam frameworks.<\/p>\n<\/li>\n<li data-start=\"1777\" data-end=\"1954\">\n<p data-start=\"1780\" data-end=\"1954\"><strong data-start=\"1780\" data-end=\"1821\">Reputation Management &amp; Smart Routing<\/strong><br data-start=\"1821\" data-end=\"1824\" \/>Protecting and elevating deliverability through IP reputation monitoring, adaptive sending logic, and feedback loop processing.<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"1956\" data-end=\"2070\">These principles guide the design of Mailjet\u2019s infrastructure at the networking, application, and protocol layers.<\/p>\n<h2 data-start=\"2077\" data-end=\"2129\"><span class=\"ez-toc-section\" id=\"2_Global_Data_Centers_and_Network_Redundancy\"><\/span><strong data-start=\"2080\" data-end=\"2129\">2. Global Data Centers and Network Redundancy<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"2131\" data-end=\"2178\"><span class=\"ez-toc-section\" id=\"Geographically_Distributed_Architecture\"><\/span><strong data-start=\"2135\" data-end=\"2178\">Geographically Distributed Architecture<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2179\" data-end=\"2490\">Mailjet uses multiple data centers located across Europe, North America, and other strategic regions. This geographic redundancy not only supports regional compliance requirements\u2014particularly important given Mailjet\u2019s EU roots and GDPR compliance\u2014but it also provides resilience against infrastructure failure.<\/p>\n<p data-start=\"2492\" data-end=\"2751\">By separating functions across distributed zones\u2014routing, queue management, storage, analytics, and API gateways\u2014Mailjet reduces the risk of a single point of failure. If one center experiences latency or downtime, traffic is automatically rerouted to others.<\/p>\n<h3 data-start=\"2753\" data-end=\"2795\"><span class=\"ez-toc-section\" id=\"Load_Balancers_and_Traffic_Routing\"><\/span><strong data-start=\"2757\" data-end=\"2795\">Load Balancers and Traffic Routing<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2796\" data-end=\"2872\">To maintain consistent performance, Mailjet uses multi-layer load balancing:<\/p>\n<ul data-start=\"2874\" data-end=\"3204\">\n<li data-start=\"2874\" data-end=\"2966\">\n<p data-start=\"2876\" data-end=\"2966\"><strong data-start=\"2876\" data-end=\"2907\">Network Edge Load Balancers<\/strong> distribute incoming SMTP and HTTP traffic across clusters.<\/p>\n<\/li>\n<li data-start=\"2967\" data-end=\"3060\">\n<p data-start=\"2969\" data-end=\"3060\"><strong data-start=\"2969\" data-end=\"2999\">Application Load Balancers<\/strong> route API and web requests to the appropriate service nodes.<\/p>\n<\/li>\n<li data-start=\"3061\" data-end=\"3204\">\n<p data-start=\"3063\" data-end=\"3204\"><strong data-start=\"3063\" data-end=\"3090\">Internal Load Balancing<\/strong> ensures that mail processing tasks\u2014DKIM signing, template rendering, queue placement\u2014are efficiently distributed.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3206\" data-end=\"3369\">This layered approach enables intelligent decision-making about where and how emails are processed, based on server health, current load, and geographic proximity.<\/p>\n<h3 data-start=\"3371\" data-end=\"3398\"><span class=\"ez-toc-section\" id=\"Failover_Capability\"><\/span><strong data-start=\"3375\" data-end=\"3398\">Failover Capability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3399\" data-end=\"3463\">Failover systems constantly monitor performance indicators like:<\/p>\n<ul data-start=\"3465\" data-end=\"3573\">\n<li data-start=\"3465\" data-end=\"3479\">\n<p data-start=\"3467\" data-end=\"3479\">Queue growth<\/p>\n<\/li>\n<li data-start=\"3480\" data-end=\"3504\">\n<p data-start=\"3482\" data-end=\"3504\">Server CPU utilization<\/p>\n<\/li>\n<li data-start=\"3505\" data-end=\"3529\">\n<p data-start=\"3507\" data-end=\"3529\">Latency and throughput<\/p>\n<\/li>\n<li data-start=\"3530\" data-end=\"3573\">\n<p data-start=\"3532\" data-end=\"3573\">Health checks for APIs and SMTP endpoints<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3575\" data-end=\"3721\">If anomalies occur, the system orchestrates an automatic failover to another region or cluster, ensuring minimal disruption to sending operations.<\/p>\n<h2 data-start=\"3728\" data-end=\"3792\"><span class=\"ez-toc-section\" id=\"3_High-Throughput_MTA_Mail_Transfer_Agent_Architecture\"><\/span><strong data-start=\"3731\" data-end=\"3792\">3. High-Throughput MTA (Mail Transfer Agent) Architecture<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3794\" data-end=\"3989\">Mailjet\u2019s deliverability success is rooted in its modern, custom-engineered MTA architecture. Unlike traditional monolithic MTAs, Mailjet\u2019s mailing engine is distributed and built for elasticity.<\/p>\n<h3 data-start=\"3991\" data-end=\"4044\"><span class=\"ez-toc-section\" id=\"Parallelized_Microservices-Driven_Processing\"><\/span><strong data-start=\"3995\" data-end=\"4044\">Parallelized, Microservices-Driven Processing<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4045\" data-end=\"4093\">Key components are separated into microservices:<\/p>\n<ul data-start=\"4095\" data-end=\"4427\">\n<li data-start=\"4095\" data-end=\"4154\">\n<p data-start=\"4097\" data-end=\"4154\"><strong data-start=\"4097\" data-end=\"4119\">Rendering service:<\/strong> Builds and personalizes templates.<\/p>\n<\/li>\n<li data-start=\"4155\" data-end=\"4213\">\n<p data-start=\"4157\" data-end=\"4213\"><strong data-start=\"4157\" data-end=\"4189\">DKIM\/Domain signing service:<\/strong> Applies authentication.<\/p>\n<\/li>\n<li data-start=\"4214\" data-end=\"4278\">\n<p data-start=\"4216\" data-end=\"4278\"><strong data-start=\"4216\" data-end=\"4245\">Queue management service:<\/strong> Places and prioritizes messages.<\/p>\n<\/li>\n<li data-start=\"4279\" data-end=\"4342\">\n<p data-start=\"4281\" data-end=\"4342\"><strong data-start=\"4281\" data-end=\"4306\">MTA delivery service:<\/strong> Communicates with destination ISPs.<\/p>\n<\/li>\n<li data-start=\"4343\" data-end=\"4427\">\n<p data-start=\"4345\" data-end=\"4427\"><strong data-start=\"4345\" data-end=\"4380\">Feedback and analytics service:<\/strong> Processes bounces, feedback loops, and events.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4429\" data-end=\"4595\">These microservices communicate through a high-speed messaging bus (often implemented via Kafka or equivalent mechanisms). By decoupling components, Mailjet achieves:<\/p>\n<ul data-start=\"4597\" data-end=\"4744\">\n<li data-start=\"4597\" data-end=\"4623\">\n<p data-start=\"4599\" data-end=\"4623\">Horizontal scalability<\/p>\n<\/li>\n<li data-start=\"4624\" data-end=\"4661\">\n<p data-start=\"4626\" data-end=\"4661\">Isolation between heavy workloads<\/p>\n<\/li>\n<li data-start=\"4662\" data-end=\"4698\">\n<p data-start=\"4664\" data-end=\"4698\">Rapid deployment of new features<\/p>\n<\/li>\n<li data-start=\"4699\" data-end=\"4744\">\n<p data-start=\"4701\" data-end=\"4744\">Fault tolerance across the email pipeline<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4746\" data-end=\"4778\"><span class=\"ez-toc-section\" id=\"Optimized_SMTP_Pipelines\"><\/span><strong data-start=\"4750\" data-end=\"4778\">Optimized SMTP Pipelines<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4779\" data-end=\"4809\">Mailjet\u2019s MTA is designed for:<\/p>\n<ul data-start=\"4811\" data-end=\"4965\">\n<li data-start=\"4811\" data-end=\"4835\">\n<p data-start=\"4813\" data-end=\"4835\">High-speed connections<\/p>\n<\/li>\n<li data-start=\"4836\" data-end=\"4860\">\n<p data-start=\"4838\" data-end=\"4860\">Parallel SMTP sessions<\/p>\n<\/li>\n<li data-start=\"4861\" data-end=\"4904\">\n<p data-start=\"4863\" data-end=\"4904\">Adaptive throttling based on ISP feedback<\/p>\n<\/li>\n<li data-start=\"4905\" data-end=\"4965\">\n<p data-start=\"4907\" data-end=\"4965\">Queue prioritization for transactional vs. marketing email<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4967\" data-end=\"5028\">This adaptive pipeline allows Mailjet to adjust in real time:<\/p>\n<ul data-start=\"5030\" data-end=\"5124\">\n<li data-start=\"5030\" data-end=\"5047\">\n<p data-start=\"5032\" data-end=\"5047\">Retry intervals<\/p>\n<\/li>\n<li data-start=\"5048\" data-end=\"5072\">\n<p data-start=\"5050\" data-end=\"5072\">Connection concurrency<\/p>\n<\/li>\n<li data-start=\"5073\" data-end=\"5096\">\n<p data-start=\"5075\" data-end=\"5096\">Sending speed per ISP<\/p>\n<\/li>\n<li data-start=\"5097\" data-end=\"5124\">\n<p data-start=\"5099\" data-end=\"5124\">Error code interpretation<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5126\" data-end=\"5248\">Such intelligent throttling is one of the most important elements in maintaining deliverability during high-volume bursts.<\/p>\n<h2 data-start=\"5255\" data-end=\"5320\"><span class=\"ez-toc-section\" id=\"4_IP_Infrastructure_Warm-Up_and_Reputation_Segmentation\"><\/span><strong data-start=\"5258\" data-end=\"5320\">4. IP Infrastructure, Warm-Up, and Reputation Segmentation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"5322\" data-end=\"5368\"><span class=\"ez-toc-section\" id=\"Shared_Dedicated_and_Hybrid_IP_Pools\"><\/span><strong data-start=\"5326\" data-end=\"5368\">Shared, Dedicated, and Hybrid IP Pools<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5369\" data-end=\"5384\">Mailjet offers:<\/p>\n<ul data-start=\"5386\" data-end=\"5561\">\n<li data-start=\"5386\" data-end=\"5427\">\n<p data-start=\"5388\" data-end=\"5427\"><strong data-start=\"5388\" data-end=\"5407\">Shared IP pools<\/strong> for small senders<\/p>\n<\/li>\n<li data-start=\"5428\" data-end=\"5493\">\n<p data-start=\"5430\" data-end=\"5493\"><strong data-start=\"5430\" data-end=\"5447\">Dedicated IPs<\/strong> for high-volume or high-sensitivity senders<\/p>\n<\/li>\n<li data-start=\"5494\" data-end=\"5561\">\n<p data-start=\"5496\" data-end=\"5561\"><strong data-start=\"5496\" data-end=\"5513\">Hybrid setups<\/strong> with a combination of reserved and pooled IPs<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5563\" data-end=\"5654\">Each IP pool is managed with strict reputation policies. Shared pools segregate senders by:<\/p>\n<ul data-start=\"5656\" data-end=\"5733\">\n<li data-start=\"5656\" data-end=\"5664\">\n<p data-start=\"5658\" data-end=\"5664\">Volume<\/p>\n<\/li>\n<li data-start=\"5665\" data-end=\"5679\">\n<p data-start=\"5667\" data-end=\"5679\">Content type<\/p>\n<\/li>\n<li data-start=\"5680\" data-end=\"5688\">\n<p data-start=\"5682\" data-end=\"5688\">Region<\/p>\n<\/li>\n<li data-start=\"5689\" data-end=\"5713\">\n<p data-start=\"5691\" data-end=\"5713\">Historical performance<\/p>\n<\/li>\n<li data-start=\"5714\" data-end=\"5733\">\n<p data-start=\"5716\" data-end=\"5733\">Compliance status<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5735\" data-end=\"5834\">This ensures that customers with similar reputational behavior share infrastructure, reducing risk.<\/p>\n<h3 data-start=\"5836\" data-end=\"5864\"><span class=\"ez-toc-section\" id=\"Automated_IP_Warm-Up\"><\/span><strong data-start=\"5840\" data-end=\"5864\">Automated IP Warm-Up<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5865\" data-end=\"5973\">New dedicated IPs must be gradually \u201cwarmed up\u201d to build trust with ISPs. Mailjet automates this process by:<\/p>\n<ol data-start=\"5975\" data-end=\"6167\">\n<li data-start=\"5975\" data-end=\"6024\">\n<p data-start=\"5978\" data-end=\"6024\">Identifying optimal volume increases per ISP<\/p>\n<\/li>\n<li data-start=\"6025\" data-end=\"6076\">\n<p data-start=\"6028\" data-end=\"6076\">Staggering delivery across multiple days\/weeks<\/p>\n<\/li>\n<li data-start=\"6077\" data-end=\"6119\">\n<p data-start=\"6080\" data-end=\"6119\">Monitoring bounce and complaint rates<\/p>\n<\/li>\n<li data-start=\"6120\" data-end=\"6167\">\n<p data-start=\"6123\" data-end=\"6167\">Adjusting the warm-up schedule dynamically<\/p>\n<\/li>\n<\/ol>\n<p data-start=\"6169\" data-end=\"6253\">This protects senders from reputation damage and improves long-term inbox placement.<\/p>\n<h3 data-start=\"6255\" data-end=\"6301\"><span class=\"ez-toc-section\" id=\"Reputation_Scoring_Anomaly_Detection\"><\/span><strong data-start=\"6259\" data-end=\"6301\">Reputation Scoring &amp; Anomaly Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6302\" data-end=\"6333\">Mailjet continuously evaluates:<\/p>\n<ul data-start=\"6335\" data-end=\"6491\">\n<li data-start=\"6335\" data-end=\"6362\">\n<p data-start=\"6337\" data-end=\"6362\">Hard\/soft bounce ratios<\/p>\n<\/li>\n<li data-start=\"6363\" data-end=\"6389\">\n<p data-start=\"6365\" data-end=\"6389\">Spam complaint signals<\/p>\n<\/li>\n<li data-start=\"6390\" data-end=\"6428\">\n<p data-start=\"6392\" data-end=\"6428\">Engagement metrics (opens, clicks)<\/p>\n<\/li>\n<li data-start=\"6429\" data-end=\"6449\">\n<p data-start=\"6431\" data-end=\"6449\">Blocklist status<\/p>\n<\/li>\n<li data-start=\"6450\" data-end=\"6468\">\n<p data-start=\"6452\" data-end=\"6468\">Spam trap hits<\/p>\n<\/li>\n<li data-start=\"6469\" data-end=\"6491\">\n<p data-start=\"6471\" data-end=\"6491\">ISP feedback loops<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"6493\" data-end=\"6691\">An internal scoring model ranks senders and assigns them to appropriate IP pools or warns them about problematic activity. This proactive system helps maintain the integrity of the entire ecosystem.<\/p>\n<h2 data-start=\"6698\" data-end=\"6758\"><span class=\"ez-toc-section\" id=\"5_Email_Authentication_and_Compliance_Infrastructure\"><\/span><strong data-start=\"6701\" data-end=\"6758\">5. Email Authentication and Compliance Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6760\" data-end=\"6857\">Authentication is central to deliverability. Mailjet enforces and encourages all major standards:<\/p>\n<h3 data-start=\"6859\" data-end=\"6896\"><span class=\"ez-toc-section\" id=\"SPF_Sender_Policy_Framework-2\"><\/span><strong data-start=\"6863\" data-end=\"6896\">SPF (Sender Policy Framework)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6897\" data-end=\"7051\">Mailjet provides SPF records that authorize its infrastructure to send on behalf of customer domains. SPF alignment improves trust with mailbox providers.<\/p>\n<h3 data-start=\"7053\" data-end=\"7094\"><span class=\"ez-toc-section\" id=\"DKIM_DomainKeys_Identified_Mail-2\"><\/span><strong data-start=\"7057\" data-end=\"7094\">DKIM (DomainKeys Identified Mail)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7095\" data-end=\"7263\">Mailjet automatically signs outgoing email using secure DKIM keys. Dedicated senders can configure custom DKIM domains for improved branding and better DMARC alignment.<\/p>\n<h3 data-start=\"7265\" data-end=\"7341\"><span class=\"ez-toc-section\" id=\"DMARC_Domain-based_Message_Authentication_Reporting_Conformance-2\"><\/span><strong data-start=\"7269\" data-end=\"7341\">DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7342\" data-end=\"7413\">Mailjet assists customers with DMARC reporting and alignment, enabling:<\/p>\n<ul data-start=\"7415\" data-end=\"7513\">\n<li data-start=\"7415\" data-end=\"7455\">\n<p data-start=\"7417\" data-end=\"7455\">Visibility into unauthorized senders<\/p>\n<\/li>\n<li data-start=\"7456\" data-end=\"7487\">\n<p data-start=\"7458\" data-end=\"7487\">Protection against spoofing<\/p>\n<\/li>\n<li data-start=\"7488\" data-end=\"7513\">\n<p data-start=\"7490\" data-end=\"7513\">Improved domain trust<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7515\" data-end=\"7656\">DMARC with strict alignment is increasingly required by major providers (Google, Yahoo), and Mailjet&#8217;s architecture supports full compliance.<\/p>\n<h3 data-start=\"7658\" data-end=\"7716\"><span class=\"ez-toc-section\" id=\"Brand_Indicators_for_Message_Identification_BIMI-2\"><\/span><strong data-start=\"7662\" data-end=\"7716\">Brand Indicators for Message Identification (BIMI)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7717\" data-end=\"7858\">For senders with strong DMARC compliance, Mailjet supports BIMI, which displays brand logos in the inbox. This enhances trust and engagement.<\/p>\n<h3 data-start=\"7860\" data-end=\"7889\"><span class=\"ez-toc-section\" id=\"Compliance_Frameworks\"><\/span><strong data-start=\"7864\" data-end=\"7889\">Compliance Frameworks<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7890\" data-end=\"7908\">Mailjet maintains:<\/p>\n<ul data-start=\"7910\" data-end=\"8065\">\n<li data-start=\"7910\" data-end=\"7929\">\n<p data-start=\"7912\" data-end=\"7929\">GDPR compliance<\/p>\n<\/li>\n<li data-start=\"7930\" data-end=\"7974\">\n<p data-start=\"7932\" data-end=\"7974\">ISO 27001 information security standards<\/p>\n<\/li>\n<li data-start=\"7975\" data-end=\"8012\">\n<p data-start=\"7977\" data-end=\"8012\">Data processing agreements (DPAs)<\/p>\n<\/li>\n<li data-start=\"8013\" data-end=\"8065\">\n<p data-start=\"8015\" data-end=\"8065\">EU-based data residency for applicable customers<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8067\" data-end=\"8179\">Regulatory compliance strengthens overall deliverability by aligning with ISP expectations for reliable senders.<\/p>\n<h2 data-start=\"8186\" data-end=\"8256\"><span class=\"ez-toc-section\" id=\"6_Content_Processing_Template_Rendering_Pre-Send_Validation\"><\/span><strong data-start=\"8189\" data-end=\"8256\">6. Content Processing, Template Rendering &amp; Pre-Send Validation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"8258\" data-end=\"8294\"><span class=\"ez-toc-section\" id=\"Template_Engine_Architecture\"><\/span><strong data-start=\"8262\" data-end=\"8294\">Template Engine Architecture<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8295\" data-end=\"8378\">Mailjet\u2019s MJML and template system is handled by dedicated rendering services that:<\/p>\n<ul data-start=\"8380\" data-end=\"8562\">\n<li data-start=\"8380\" data-end=\"8427\">\n<p data-start=\"8382\" data-end=\"8427\">Compile template syntax into optimized HTML<\/p>\n<\/li>\n<li data-start=\"8428\" data-end=\"8472\">\n<p data-start=\"8430\" data-end=\"8472\">Personalize using variables and segments<\/p>\n<\/li>\n<li data-start=\"8473\" data-end=\"8523\">\n<p data-start=\"8475\" data-end=\"8523\">Validate for missing tags or malformed content<\/p>\n<\/li>\n<li data-start=\"8524\" data-end=\"8562\">\n<p data-start=\"8526\" data-end=\"8562\">Optimize for mobile responsiveness<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8564\" data-end=\"8704\">This pre-processing ensures that content-related deliverability issues (broken HTML, excessive images, missing text versions) are minimized.<\/p>\n<h3 data-start=\"8706\" data-end=\"8744\"><span class=\"ez-toc-section\" id=\"Pre-Send_Checks_Spam_Filters\"><\/span><strong data-start=\"8710\" data-end=\"8744\">Pre-Send Checks &amp; Spam Filters<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"8745\" data-end=\"8813\">Before messages enter the MTA pipeline, Mailjet runs content checks:<\/p>\n<ul data-start=\"8815\" data-end=\"9003\">\n<li data-start=\"8815\" data-end=\"8848\">\n<p data-start=\"8817\" data-end=\"8848\">Spam-trigger keyword scanning<\/p>\n<\/li>\n<li data-start=\"8849\" data-end=\"8868\">\n<p data-start=\"8851\" data-end=\"8868\">Link validation<\/p>\n<\/li>\n<li data-start=\"8869\" data-end=\"8909\">\n<p data-start=\"8871\" data-end=\"8909\">Blacklist scanning of linked domains<\/p>\n<\/li>\n<li data-start=\"8910\" data-end=\"8970\">\n<p data-start=\"8912\" data-end=\"8970\">Missing unsubscribe link detection (for marketing email)<\/p>\n<\/li>\n<li data-start=\"8971\" data-end=\"9003\">\n<p data-start=\"8973\" data-end=\"9003\">Image-to-text ratio analysis<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"9005\" data-end=\"9142\">Though Mailjet does not alter customer content without consent, its system\u2019s warnings and flags help users avoid deliverability pitfalls.<\/p>\n<h2 data-start=\"9149\" data-end=\"9211\"><span class=\"ez-toc-section\" id=\"7_Adaptive_Deliverability_Logic_and_ISP-Specific_Rules\"><\/span><strong data-start=\"9152\" data-end=\"9211\">7. Adaptive Deliverability Logic and ISP-Specific Rules<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"9213\" data-end=\"9379\">Mailbox providers (Gmail, Outlook, Yahoo, etc.) each maintain unique requirements and thresholds. Mailjet\u2019s adaptive routing layer observes ISP behavior in real time.<\/p>\n<h3 data-start=\"9381\" data-end=\"9409\"><span class=\"ez-toc-section\" id=\"ISP-Aware_Throttling\"><\/span><strong data-start=\"9385\" data-end=\"9409\">ISP-Aware Throttling<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9410\" data-end=\"9472\">The system alters transport behavior based on per-ISP signals:<\/p>\n<ul data-start=\"9474\" data-end=\"9547\">\n<li data-start=\"9474\" data-end=\"9497\">\n<p data-start=\"9476\" data-end=\"9497\">Temporary deferrals<\/p>\n<\/li>\n<li data-start=\"9498\" data-end=\"9513\">\n<p data-start=\"9500\" data-end=\"9513\">Rate limits<\/p>\n<\/li>\n<li data-start=\"9514\" data-end=\"9531\">\n<p data-start=\"9516\" data-end=\"9531\">Block notices<\/p>\n<\/li>\n<li data-start=\"9532\" data-end=\"9547\">\n<p data-start=\"9534\" data-end=\"9547\">Greylisting<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"9549\" data-end=\"9621\">For instance, if Gmail begins deferring messages due to volume, Mailjet:<\/p>\n<ul data-start=\"9623\" data-end=\"9807\">\n<li data-start=\"9623\" data-end=\"9657\">\n<p data-start=\"9625\" data-end=\"9657\">Reduces connection concurrency<\/p>\n<\/li>\n<li data-start=\"9658\" data-end=\"9680\">\n<p data-start=\"9660\" data-end=\"9680\">Spaces out retries<\/p>\n<\/li>\n<li data-start=\"9681\" data-end=\"9716\">\n<p data-start=\"9683\" data-end=\"9716\">Sends at a lower volume ceiling<\/p>\n<\/li>\n<li data-start=\"9717\" data-end=\"9748\">\n<p data-start=\"9719\" data-end=\"9748\">Monitors real-time feedback<\/p>\n<\/li>\n<li data-start=\"9749\" data-end=\"9807\">\n<p data-start=\"9751\" data-end=\"9807\">Attempts higher sending rates after conditions improve<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"9809\" data-end=\"9842\"><span class=\"ez-toc-section\" id=\"Error_Code_Interpretation\"><\/span><strong data-start=\"9813\" data-end=\"9842\">Error Code Interpretation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"9843\" data-end=\"10010\">Bounce codes vary widely across providers. Mailjet\u2019s engine normalizes hundreds of error types into standardized categories so senders receive meaningful explanations:<\/p>\n<ul data-start=\"10012\" data-end=\"10116\">\n<li data-start=\"10012\" data-end=\"10027\">\n<p data-start=\"10014\" data-end=\"10027\">Hard bounce<\/p>\n<\/li>\n<li data-start=\"10028\" data-end=\"10043\">\n<p data-start=\"10030\" data-end=\"10043\">Soft bounce<\/p>\n<\/li>\n<li data-start=\"10044\" data-end=\"10064\">\n<p data-start=\"10046\" data-end=\"10064\">Policy rejection<\/p>\n<\/li>\n<li data-start=\"10065\" data-end=\"10087\">\n<p data-start=\"10067\" data-end=\"10087\">Spam-related block<\/p>\n<\/li>\n<li data-start=\"10088\" data-end=\"10116\">\n<p data-start=\"10090\" data-end=\"10116\">Temporary system failure<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10118\" data-end=\"10182\">This enables more accurate decision-making for future campaigns.<\/p>\n<h3 data-start=\"10184\" data-end=\"10229\"><span class=\"ez-toc-section\" id=\"Feedback_Loops_and_Engagement_Signals\"><\/span><strong data-start=\"10188\" data-end=\"10229\">Feedback Loops and Engagement Signals<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10230\" data-end=\"10335\">Mailjet connects with major ISPs\u2019 feedback loop systems when available. If a user marks an email as spam:<\/p>\n<ul data-start=\"10337\" data-end=\"10450\">\n<li data-start=\"10337\" data-end=\"10380\">\n<p data-start=\"10339\" data-end=\"10380\">The address is automatically suppressed<\/p>\n<\/li>\n<li data-start=\"10381\" data-end=\"10413\">\n<p data-start=\"10383\" data-end=\"10413\">Complaint rates are recorded<\/p>\n<\/li>\n<li data-start=\"10414\" data-end=\"10450\">\n<p data-start=\"10416\" data-end=\"10450\">IPs and reputations are adjusted<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10452\" data-end=\"10496\">These actions help preserve inbox placement.<\/p>\n<h2 data-start=\"10503\" data-end=\"10555\"><span class=\"ez-toc-section\" id=\"8_API-Centric_Architecture_and_Extensibility\"><\/span><strong data-start=\"10506\" data-end=\"10555\">8. API-Centric Architecture and Extensibility<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"10557\" data-end=\"10582\"><span class=\"ez-toc-section\" id=\"REST_API_Gateways\"><\/span><strong data-start=\"10561\" data-end=\"10582\">REST API Gateways<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10583\" data-end=\"10669\">Mailjet\u2019s REST APIs operate behind a horizontally scaled gateway system. These handle:<\/p>\n<ul data-start=\"10671\" data-end=\"10748\">\n<li data-start=\"10671\" data-end=\"10689\">\n<p data-start=\"10673\" data-end=\"10689\">Authentication<\/p>\n<\/li>\n<li data-start=\"10690\" data-end=\"10707\">\n<p data-start=\"10692\" data-end=\"10707\">Rate limiting<\/p>\n<\/li>\n<li data-start=\"10708\" data-end=\"10728\">\n<p data-start=\"10710\" data-end=\"10728\">Endpoint routing<\/p>\n<\/li>\n<li data-start=\"10729\" data-end=\"10748\">\n<p data-start=\"10731\" data-end=\"10748\">Version control<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"10750\" data-end=\"10892\">The API gateway is designed to handle extremely high request volumes while maintaining low latency, crucial for real-time transactional email.<\/p>\n<h3 data-start=\"10894\" data-end=\"10927\"><span class=\"ez-toc-section\" id=\"SMTP_Relay_Infrastructure\"><\/span><strong data-start=\"10898\" data-end=\"10927\">SMTP Relay Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"10928\" data-end=\"11024\">Many customers rely on SMTP relay instead of APIs. Mailjet maintains robust SMTP endpoints with:<\/p>\n<ul data-start=\"11026\" data-end=\"11153\">\n<li data-start=\"11026\" data-end=\"11044\">\n<p data-start=\"11028\" data-end=\"11044\">TLS encryption<\/p>\n<\/li>\n<li data-start=\"11045\" data-end=\"11087\">\n<p data-start=\"11047\" data-end=\"11087\">Authentication and anti-abuse controls<\/p>\n<\/li>\n<li data-start=\"11088\" data-end=\"11125\">\n<p data-start=\"11090\" data-end=\"11125\">Automatic failover across regions<\/p>\n<\/li>\n<li data-start=\"11126\" data-end=\"11153\">\n<p data-start=\"11128\" data-end=\"11153\">High session throughput<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"11155\" data-end=\"11208\">This ensures reliable sending even during peak loads.<\/p>\n<h3 data-start=\"11210\" data-end=\"11255\"><span class=\"ez-toc-section\" id=\"Webhooks_Real-Time_Event_Processing\"><\/span><strong data-start=\"11214\" data-end=\"11255\">Webhooks &amp; Real-Time Event Processing<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11256\" data-end=\"11315\">Customers can receive near-instantaneous notifications for:<\/p>\n<ul data-start=\"11317\" data-end=\"11408\">\n<li data-start=\"11317\" data-end=\"11331\">\n<p data-start=\"11319\" data-end=\"11331\">Deliveries<\/p>\n<\/li>\n<li data-start=\"11332\" data-end=\"11341\">\n<p data-start=\"11334\" data-end=\"11341\">Opens<\/p>\n<\/li>\n<li data-start=\"11342\" data-end=\"11352\">\n<p data-start=\"11344\" data-end=\"11352\">Clicks<\/p>\n<\/li>\n<li data-start=\"11353\" data-end=\"11369\">\n<p data-start=\"11355\" data-end=\"11369\">Unsubscribes<\/p>\n<\/li>\n<li data-start=\"11370\" data-end=\"11389\">\n<p data-start=\"11372\" data-end=\"11389\">Spam complaints<\/p>\n<\/li>\n<li data-start=\"11390\" data-end=\"11408\">\n<p data-start=\"11392\" data-end=\"11408\">Blocks\/bounces<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"11410\" data-end=\"11564\">Mailjet uses event-driven architecture to capture and process these events at scale, allowing senders to integrate real-time analytics into their systems.<\/p>\n<h2 data-start=\"11571\" data-end=\"11627\"><span class=\"ez-toc-section\" id=\"9_Storage_Systems_Data_Pipelines_and_Analytics\"><\/span><strong data-start=\"11574\" data-end=\"11627\">9. Storage Systems, Data Pipelines, and Analytics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"11629\" data-end=\"11656\"><span class=\"ez-toc-section\" id=\"Distributed_Storage\"><\/span><strong data-start=\"11633\" data-end=\"11656\">Distributed Storage<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"11657\" data-end=\"11757\">Mailjet stores user data, email events, templates, and lists in distributed databases optimized for:<\/p>\n<ul data-start=\"11759\" data-end=\"11836\">\n<li data-start=\"11759\" data-end=\"11778\">\n<p data-start=\"11761\" data-end=\"11778\">High availability<\/p>\n<\/li>\n<li data-start=\"11779\" data-end=\"11795\">\n<p data-start=\"11781\" data-end=\"11795\">Fast retrieval<\/p>\n<\/li>\n<li data-start=\"11796\" data-end=\"11836\">\n<p data-start=\"11798\" data-end=\"11836\">Scalability across millions of records<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"11838\" data-end=\"11978\">Depending on the data type, various storage layers may include SQL systems for relational data and NoSQL systems for logs and event streams.<\/p>\n<h3 data-start=\"11980\" data-end=\"12013\"><span class=\"ez-toc-section\" id=\"Event_Processing_Pipeline\"><\/span><strong data-start=\"11984\" data-end=\"12013\">Event Processing Pipeline<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12014\" data-end=\"12046\">Event processing is built using:<\/p>\n<ul data-start=\"12048\" data-end=\"12222\">\n<li data-start=\"12048\" data-end=\"12098\">\n<p data-start=\"12050\" data-end=\"12098\">Stream ingestion (e.g., Kafka-style pipelines)<\/p>\n<\/li>\n<li data-start=\"12099\" data-end=\"12171\">\n<p data-start=\"12101\" data-end=\"12171\">Real-time processing (e.g., microservices that transform raw events)<\/p>\n<\/li>\n<li data-start=\"12172\" data-end=\"12200\">\n<p data-start=\"12174\" data-end=\"12200\">Aggregation and indexing<\/p>\n<\/li>\n<li data-start=\"12201\" data-end=\"12222\">\n<p data-start=\"12203\" data-end=\"12222\">Long-term storage<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"12224\" data-end=\"12248\">These pipelines support:<\/p>\n<ul data-start=\"12250\" data-end=\"12347\">\n<li data-start=\"12250\" data-end=\"12285\">\n<p data-start=\"12252\" data-end=\"12285\">Precise deliverability tracking<\/p>\n<\/li>\n<li data-start=\"12286\" data-end=\"12310\">\n<p data-start=\"12288\" data-end=\"12310\">Real-time dashboards<\/p>\n<\/li>\n<li data-start=\"12311\" data-end=\"12347\">\n<p data-start=\"12313\" data-end=\"12347\">Engagement history per recipient<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"12349\" data-end=\"12434\">Maintaining clean and accurate event data is critical for deliverability improvement.<\/p>\n<h2 data-start=\"12441\" data-end=\"12496\"><span class=\"ez-toc-section\" id=\"10_Security_Architecture_and_Anti-Abuse_Systems\"><\/span><strong data-start=\"12444\" data-end=\"12496\">10. Security Architecture and Anti-Abuse Systems<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"12498\" data-end=\"12586\">Deliverability relies on trust\u2014and trust relies on security. Mailjet invests heavily in:<\/p>\n<h3 data-start=\"12588\" data-end=\"12635\"><span class=\"ez-toc-section\" id=\"Authentication_Authorization_Controls\"><\/span><strong data-start=\"12592\" data-end=\"12635\">Authentication &amp; Authorization Controls<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"12636\" data-end=\"12762\">\n<li data-start=\"12636\" data-end=\"12668\">\n<p data-start=\"12638\" data-end=\"12668\">Secure token access for APIs<\/p>\n<\/li>\n<li data-start=\"12669\" data-end=\"12713\">\n<p data-start=\"12671\" data-end=\"12713\">Multi-factor authentication for accounts<\/p>\n<\/li>\n<li data-start=\"12714\" data-end=\"12762\">\n<p data-start=\"12716\" data-end=\"12762\">Permission roles and sub-account segregation<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"12764\" data-end=\"12792\"><span class=\"ez-toc-section\" id=\"Anti-Abuse_Detection\"><\/span><strong data-start=\"12768\" data-end=\"12792\">Anti-Abuse Detection<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12793\" data-end=\"12815\">The platform monitors:<\/p>\n<ul data-start=\"12817\" data-end=\"12962\">\n<li data-start=\"12817\" data-end=\"12848\">\n<p data-start=\"12819\" data-end=\"12848\">Suspicious sending patterns<\/p>\n<\/li>\n<li data-start=\"12849\" data-end=\"12879\">\n<p data-start=\"12851\" data-end=\"12879\">Suddenly high bounce rates<\/p>\n<\/li>\n<li data-start=\"12880\" data-end=\"12906\">\n<p data-start=\"12882\" data-end=\"12906\">Unusual traffic spikes<\/p>\n<\/li>\n<li data-start=\"12907\" data-end=\"12937\">\n<p data-start=\"12909\" data-end=\"12937\">Spam-like content patterns<\/p>\n<\/li>\n<li data-start=\"12938\" data-end=\"12962\">\n<p data-start=\"12940\" data-end=\"12962\">High complaint rates<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"12964\" data-end=\"13120\">Machine-learning models flag potential abuse, triggering automated restrictions or compliance reviews. These measures protect IP reputation for all senders.<\/p>\n<h3 data-start=\"13122\" data-end=\"13145\"><span class=\"ez-toc-section\" id=\"Data_Encryption\"><\/span><strong data-start=\"13126\" data-end=\"13145\">Data Encryption<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13146\" data-end=\"13283\">All data in transit is encrypted via TLS. Sensitive stored data is encrypted at rest. This fulfills both compliance and ISP expectations.<\/p>\n<h2 data-start=\"13290\" data-end=\"13332\"><span class=\"ez-toc-section\" id=\"11_Scaling_for_Peak_Deliverability\"><\/span><strong data-start=\"13293\" data-end=\"13332\">11. Scaling for Peak Deliverability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"13334\" data-end=\"13509\">Major events\u2014Black Friday, Cyber Monday, and holiday seasons\u2014produce enormous spikes in global email traffic. Mailjet\u2019s architecture is built to withstand such surges through:<\/p>\n<h3 data-start=\"13511\" data-end=\"13546\"><span class=\"ez-toc-section\" id=\"Auto-Scaling_Infrastructure\"><\/span><strong data-start=\"13515\" data-end=\"13546\">Auto-Scaling Infrastructure<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13547\" data-end=\"13604\">Elastic compute resources ramp up automatically based on:<\/p>\n<ul data-start=\"13606\" data-end=\"13678\">\n<li data-start=\"13606\" data-end=\"13622\">\n<p data-start=\"13608\" data-end=\"13622\">Queue growth<\/p>\n<\/li>\n<li data-start=\"13623\" data-end=\"13635\">\n<p data-start=\"13625\" data-end=\"13635\">CPU load<\/p>\n<\/li>\n<li data-start=\"13636\" data-end=\"13658\">\n<p data-start=\"13638\" data-end=\"13658\">API request volume<\/p>\n<\/li>\n<li data-start=\"13659\" data-end=\"13678\">\n<p data-start=\"13661\" data-end=\"13678\">SMTP throughput<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"13680\" data-end=\"13734\"><span class=\"ez-toc-section\" id=\"Separate_Transactional_vs_Marketing_Pipelines\"><\/span><strong data-start=\"13684\" data-end=\"13734\">Separate Transactional vs. Marketing Pipelines<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13735\" data-end=\"13783\">Transactional email receives priority, ensuring:<\/p>\n<ul data-start=\"13785\" data-end=\"13860\">\n<li data-start=\"13785\" data-end=\"13805\">\n<p data-start=\"13787\" data-end=\"13805\">Instant delivery<\/p>\n<\/li>\n<li data-start=\"13806\" data-end=\"13833\">\n<p data-start=\"13808\" data-end=\"13833\">Dedicated IP reputation<\/p>\n<\/li>\n<li data-start=\"13834\" data-end=\"13860\">\n<p data-start=\"13836\" data-end=\"13860\">Performance guarantees<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"13862\" data-end=\"13964\">Marketing email is processed in parallel but under algorithms that balance speed with ISP rate limits.<\/p>\n<h3 data-start=\"13966\" data-end=\"14007\"><span class=\"ez-toc-section\" id=\"Traffic_Prediction_Load_Testing\"><\/span><strong data-start=\"13970\" data-end=\"14007\">Traffic Prediction &amp; Load Testing<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"14008\" data-end=\"14170\">Mailjet analyzes historical volumes to model expected spikes. Load tests validate that infrastructure can handle projected demand with sufficient buffer capacity.<\/p>\n<h2 data-start=\"14177\" data-end=\"14240\"><span class=\"ez-toc-section\" id=\"12_Monitoring_Observability_Deliverability_Analytics\"><\/span><strong data-start=\"14180\" data-end=\"14240\">12. Monitoring, Observability &amp; Deliverability Analytics<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"14242\" data-end=\"14327\">Continuous monitoring is essential for maintaining high deliverability. Mailjet uses:<\/p>\n<h3 data-start=\"14329\" data-end=\"14363\"><span class=\"ez-toc-section\" id=\"Real-Time_Monitoring_Tools\"><\/span><strong data-start=\"14333\" data-end=\"14363\">Real-Time Monitoring Tools<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul data-start=\"14364\" data-end=\"14470\">\n<li data-start=\"14364\" data-end=\"14381\">\n<p data-start=\"14366\" data-end=\"14381\">Queue metrics<\/p>\n<\/li>\n<li data-start=\"14382\" data-end=\"14407\">\n<p data-start=\"14384\" data-end=\"14407\">MTA connection status<\/p>\n<\/li>\n<li data-start=\"14408\" data-end=\"14423\">\n<p data-start=\"14410\" data-end=\"14423\">Error rates<\/p>\n<\/li>\n<li data-start=\"14424\" data-end=\"14443\">\n<p data-start=\"14426\" data-end=\"14443\">Network latency<\/p>\n<\/li>\n<li data-start=\"14444\" data-end=\"14470\">\n<p data-start=\"14446\" data-end=\"14470\">CPU and memory metrics<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"14472\" data-end=\"14505\"><span class=\"ez-toc-section\" id=\"Deliverability_Dashboards\"><\/span><strong data-start=\"14476\" data-end=\"14505\">Deliverability Dashboards<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"14506\" data-end=\"14562\">Customers and internal deliverability specialists track:<\/p>\n<ul data-start=\"14564\" data-end=\"14697\">\n<li data-start=\"14564\" data-end=\"14591\">\n<p data-start=\"14566\" data-end=\"14591\">Inbox placement signals<\/p>\n<\/li>\n<li data-start=\"14592\" data-end=\"14626\">\n<p data-start=\"14594\" data-end=\"14626\">Engagement (open\/click) trends<\/p>\n<\/li>\n<li data-start=\"14627\" data-end=\"14648\">\n<p data-start=\"14629\" data-end=\"14648\">Bounce categories<\/p>\n<\/li>\n<li data-start=\"14649\" data-end=\"14672\">\n<p data-start=\"14651\" data-end=\"14672\">ISP-specific issues<\/p>\n<\/li>\n<li data-start=\"14673\" data-end=\"14697\">\n<p data-start=\"14675\" data-end=\"14697\">Spam complaint rates<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"14699\" data-end=\"14721\"><span class=\"ez-toc-section\" id=\"SLA_Compliance\"><\/span><strong data-start=\"14703\" data-end=\"14721\">SLA Compliance<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"14722\" data-end=\"14828\">Internal teams monitor uptime and performance SLAs, ensuring customers receive consistent service quality.<\/p>\n<h1 data-start=\"233\" data-end=\"327\"><span class=\"ez-toc-section\" id=\"Authentication_Protocols_Compliance_in_Mailjet_SPF_DKIM_DMARC_BIMI_GDPR_and_More\"><\/span><strong data-start=\"235\" data-end=\"327\">Authentication Protocols &amp; Compliance in Mailjet: SPF, DKIM, DMARC, BIMI, GDPR, and More<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p data-start=\"329\" data-end=\"868\">Email deliverability and trust are at the core of any successful email-marketing or transactional-email strategy. Mailjet\u2014an email service provider (ESP) now part of Sinch\u2014integrates a wide range of authentication and compliance mechanisms to help senders meet modern security standards, protect their domains, and comply with international data-protection regulations. Understanding the role of SPF, DKIM, DMARC, BIMI, and GDPR is essential for organizations that want to maintain strong deliverability and protect their brand reputation.<\/p>\n<p data-start=\"870\" data-end=\"1006\">This article explores these protocols and compliance requirements in depth, explaining how they work within Mailjet and why they matter.<\/p>\n<h2 data-start=\"1013\" data-end=\"1053\"><span class=\"ez-toc-section\" id=\"1_Sender_Authentication_Overview\"><\/span><strong data-start=\"1016\" data-end=\"1053\">1. Sender Authentication Overview<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1055\" data-end=\"1404\">Email authentication protocols verify that messages come from legitimate sources and have not been tampered with. Without them, emails are vulnerable to spoofing, phishing, and deliverability issues. Major mailbox providers\u2014Gmail, Outlook, Yahoo, iCloud, and others\u2014use these protocols to assess whether to accept, reject, or flag incoming messages.<\/p>\n<p data-start=\"1406\" data-end=\"1507\">Mailjet supports and encourages the implementation of all modern authentication standards, including:<\/p>\n<ul data-start=\"1509\" data-end=\"1724\">\n<li data-start=\"1509\" data-end=\"1546\">\n<p data-start=\"1511\" data-end=\"1546\"><strong data-start=\"1511\" data-end=\"1544\">SPF (Sender Policy Framework)<\/strong><\/p>\n<\/li>\n<li data-start=\"1547\" data-end=\"1588\">\n<p data-start=\"1549\" data-end=\"1588\"><strong data-start=\"1549\" data-end=\"1586\">DKIM (DomainKeys Identified Mail)<\/strong><\/p>\n<\/li>\n<li data-start=\"1589\" data-end=\"1665\">\n<p data-start=\"1591\" data-end=\"1665\"><strong data-start=\"1591\" data-end=\"1663\">DMARC (Domain-based Message Authentication, Reporting &amp; Conformance)<\/strong><\/p>\n<\/li>\n<li data-start=\"1666\" data-end=\"1724\">\n<p data-start=\"1668\" data-end=\"1724\"><strong data-start=\"1668\" data-end=\"1722\">BIMI (Brand Indicators for Message Identification)<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1726\" data-end=\"1830\">Together, these protocols create a layered trust system that protects both the sender and the recipient.<\/p>\n<h2 data-start=\"1837\" data-end=\"1891\"><span class=\"ez-toc-section\" id=\"2_SPF_Allowing_Mailjet_to_Send_on_Your_Behalf\"><\/span><strong data-start=\"1840\" data-end=\"1891\">2. SPF: Allowing Mailjet to Send on Your Behalf<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1893\" data-end=\"2071\"><strong data-start=\"1893\" data-end=\"1926\">SPF (Sender Policy Framework)<\/strong> is a DNS-based authorization protocol. It tells receiving email servers which IP addresses or ESPs are allowed to send emails using your domain.<\/p>\n<h3 data-start=\"2073\" data-end=\"2094\"><span class=\"ez-toc-section\" id=\"How_SPF_Works\"><\/span><strong data-start=\"2077\" data-end=\"2094\">How SPF Works<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2095\" data-end=\"2344\">When a Mailjet email is received, the receiving mail server checks the domain\u2019s SPF record. It looks for Mailjet\u2019s sending infrastructure in the list of approved senders. If the Mailjet entry is present and properly configured, the email passes SPF.<\/p>\n<h3 data-start=\"2346\" data-end=\"2368\"><span class=\"ez-toc-section\" id=\"SPF_in_Mailjet\"><\/span><strong data-start=\"2350\" data-end=\"2368\">SPF in Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2369\" data-end=\"2454\">Mailjet provides a DNS TXT entry you must add to your domain, usually in the form of:<\/p>\n<div class=\"contain-inline-size rounded-2xl corner-superellipse\/1.1 relative bg-token-sidebar-surface-primary\">\n<div class=\"sticky top-9\">\n<div class=\"absolute end-0 bottom-0 flex h-9 items-center pe-2\">\n<div class=\"bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs\"><\/div>\n<\/div>\n<\/div>\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"whitespace-pre!\"><span class=\"hljs-attr\">v<\/span>=spf1 include:spf.mailjet.com ~all<br \/>\n<\/code><\/div>\n<\/div>\n<p data-start=\"2501\" data-end=\"2828\">This <code data-start=\"2506\" data-end=\"2515\">include<\/code> directive authorizes Mailjet\u2019s servers to send on your behalf. Mailjet recommends that customers avoid multiple SPF includes or long SPF records that risk exceeding the 10-lookup limit. A well-configured SPF record reduces spam flags, improves deliverability, and forms the first layer of trusted email identity.<\/p>\n<h2 data-start=\"2835\" data-end=\"2894\"><span class=\"ez-toc-section\" id=\"3_DKIM_Cryptographic_Signing_for_Message_Integrity\"><\/span><strong data-start=\"2838\" data-end=\"2894\">3. DKIM: Cryptographic Signing for Message Integrity<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2896\" data-end=\"3007\"><strong data-start=\"2896\" data-end=\"2933\">DKIM (DomainKeys Identified Mail)<\/strong> adds a digital signature to outgoing emails. This signature ensures that:<\/p>\n<ul data-start=\"3009\" data-end=\"3133\">\n<li data-start=\"3009\" data-end=\"3064\">\n<p data-start=\"3011\" data-end=\"3064\">the message content was not altered in transit, and<\/p>\n<\/li>\n<li data-start=\"3065\" data-end=\"3133\">\n<p data-start=\"3067\" data-end=\"3133\">the email truly originates from the domain it claims to represent.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"3135\" data-end=\"3157\"><span class=\"ez-toc-section\" id=\"How_DKIM_Works\"><\/span><strong data-start=\"3139\" data-end=\"3157\">How DKIM Works<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3158\" data-end=\"3390\">Each email is signed using a private key stored by Mailjet. The corresponding public key is stored in your domain\u2019s DNS. Receiving servers verify the signature using the public key. If the signature matches, the message passes DKIM.<\/p>\n<h3 data-start=\"3392\" data-end=\"3415\"><span class=\"ez-toc-section\" id=\"DKIM_in_Mailjet\"><\/span><strong data-start=\"3396\" data-end=\"3415\">DKIM in Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3416\" data-end=\"3433\">Mailjet provides:<\/p>\n<ul data-start=\"3435\" data-end=\"3508\">\n<li data-start=\"3435\" data-end=\"3454\">\n<p data-start=\"3437\" data-end=\"3454\">A <strong data-start=\"3439\" data-end=\"3451\">selector<\/strong>,<\/p>\n<\/li>\n<li data-start=\"3455\" data-end=\"3476\">\n<p data-start=\"3457\" data-end=\"3476\">A <strong data-start=\"3459\" data-end=\"3473\">public key<\/strong>,<\/p>\n<\/li>\n<li data-start=\"3477\" data-end=\"3508\">\n<p data-start=\"3479\" data-end=\"3508\">DNS records you must publish.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"3510\" data-end=\"3533\">Typical DKIM DNS entry:<\/p>\n<div class=\"contain-inline-size rounded-2xl corner-superellipse\/1.1 relative bg-token-sidebar-surface-primary\">\n<div class=\"sticky top-9\">\n<div class=\"absolute end-0 bottom-0 flex h-9 items-center pe-2\">\n<div class=\"bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs\"><\/div>\n<\/div>\n<\/div>\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"whitespace-pre!\">mailjet._domainkey.yourdomain.com IN TXT <span class=\"hljs-string\">\"v=DKIM1; k=rsa; p=...\"<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p data-start=\"3609\" data-end=\"3810\">DKIM is crucial for modern deliverability. Many ISPs and corporate mail filters treat unsigned messages as suspicious. With DKIM enabled, Mailjet signs all outbound emails using your domain\u2019s identity.<\/p>\n<h2 data-start=\"3817\" data-end=\"3866\"><span class=\"ez-toc-section\" id=\"4_DMARC_Policy_Enforcement_and_Reporting\"><\/span><strong data-start=\"3820\" data-end=\"3866\">4. DMARC: Policy Enforcement and Reporting<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"3868\" data-end=\"4077\"><strong data-start=\"3868\" data-end=\"3940\">DMARC (Domain-Based Message Authentication, Reporting &amp; Conformance)<\/strong> builds on SPF and DKIM by creating a unified policy framework. It tells mailbox providers what to do when an email fails authentication.<\/p>\n<h3 data-start=\"4079\" data-end=\"4102\"><span class=\"ez-toc-section\" id=\"How_DMARC_Works\"><\/span><strong data-start=\"4083\" data-end=\"4102\">How DMARC Works<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4103\" data-end=\"4118\">DMARC requires:<\/p>\n<ul data-start=\"4119\" data-end=\"4236\">\n<li data-start=\"4119\" data-end=\"4141\">\n<p data-start=\"4121\" data-end=\"4141\">A valid SPF record<\/p>\n<\/li>\n<li data-start=\"4142\" data-end=\"4165\">\n<p data-start=\"4144\" data-end=\"4165\">A valid DKIM record<\/p>\n<\/li>\n<li data-start=\"4166\" data-end=\"4236\">\n<p data-start=\"4168\" data-end=\"4236\">Alignment between the \u201cFrom\u201d domain and the domains used in SPF\/DKIM<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4238\" data-end=\"4295\">Once configured, DMARC can instruct mailbox providers to:<\/p>\n<ul data-start=\"4297\" data-end=\"4429\">\n<li data-start=\"4297\" data-end=\"4324\">\n<p data-start=\"4299\" data-end=\"4324\"><strong data-start=\"4299\" data-end=\"4307\">none<\/strong> \u2013 monitor only<\/p>\n<\/li>\n<li data-start=\"4325\" data-end=\"4376\">\n<p data-start=\"4327\" data-end=\"4376\"><strong data-start=\"4327\" data-end=\"4341\">quarantine<\/strong> \u2013 send suspicious emails to spam<\/p>\n<\/li>\n<li data-start=\"4377\" data-end=\"4429\">\n<p data-start=\"4379\" data-end=\"4429\"><strong data-start=\"4379\" data-end=\"4389\">reject<\/strong> \u2013 block non-compliant emails entirely<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"4431\" data-end=\"4550\">It also supports reporting. Senders can receive daily XML reports detailing authentication results across the Internet.<\/p>\n<h3 data-start=\"4552\" data-end=\"4576\"><span class=\"ez-toc-section\" id=\"DMARC_in_Mailjet\"><\/span><strong data-start=\"4556\" data-end=\"4576\">DMARC in Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4577\" data-end=\"4783\">Mailjet supports DMARC by ensuring SPF and DKIM alignment with your sending domain. While Mailjet cannot create DMARC policies for you, it provides clear documentation to help you configure records such as:<\/p>\n<div class=\"contain-inline-size rounded-2xl corner-superellipse\/1.1 relative bg-token-sidebar-surface-primary\">\n<div class=\"sticky top-9\">\n<div class=\"absolute end-0 bottom-0 flex h-9 items-center pe-2\">\n<div class=\"bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs\"><\/div>\n<\/div>\n<\/div>\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"whitespace-pre!\"><span class=\"hljs-attr\">v<\/span>=DMARC1<span class=\"hljs-comment\">; p=quarantine; rua=mailto:dmarc@yourdomain.com; ruf=mailto:dmarc-failure@yourdomain.com; fo=1;<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p data-start=\"4898\" data-end=\"5080\">DMARC is becoming mandatory across major platforms. Google and Yahoo now require DMARC enforcement for bulk senders. For any high-volume Mailjet account, DMARC is no longer optional.<\/p>\n<h2 data-start=\"5087\" data-end=\"5151\"><span class=\"ez-toc-section\" id=\"5_BIMI_Improving_Brand_Recognition_with_Visual_Identity\"><\/span><strong data-start=\"5090\" data-end=\"5151\">5. BIMI: Improving Brand Recognition with Visual Identity<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5153\" data-end=\"5318\"><strong data-start=\"5153\" data-end=\"5207\">BIMI (Brand Indicators for Message Identification)<\/strong> is an emerging standard that displays your brand\u2019s logo next to authenticated emails in participating inboxes.<\/p>\n<h3 data-start=\"5320\" data-end=\"5349\"><span class=\"ez-toc-section\" id=\"Requirements_for_BIMI\"><\/span><strong data-start=\"5324\" data-end=\"5349\">Requirements for BIMI<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5350\" data-end=\"5377\">To use BIMI, you must have:<\/p>\n<ol data-start=\"5379\" data-end=\"5624\">\n<li data-start=\"5379\" data-end=\"5457\">\n<p data-start=\"5382\" data-end=\"5457\"><strong data-start=\"5382\" data-end=\"5455\">SPF, DKIM, and DMARC (at enforcement level: <code data-start=\"5428\" data-end=\"5440\">quarantine<\/code> or <code data-start=\"5444\" data-end=\"5452\">reject<\/code>)<\/strong><\/p>\n<\/li>\n<li data-start=\"5458\" data-end=\"5504\">\n<p data-start=\"5461\" data-end=\"5504\">An SVG logo that meets BIMI specification<\/p>\n<\/li>\n<li data-start=\"5505\" data-end=\"5527\">\n<p data-start=\"5508\" data-end=\"5527\">A BIMI DNS record<\/p>\n<\/li>\n<li data-start=\"5528\" data-end=\"5624\">\n<p data-start=\"5531\" data-end=\"5624\">For some providers, a <strong data-start=\"5553\" data-end=\"5588\">VMC (Verified Mark Certificate)<\/strong> issued by a certification authority<\/p>\n<\/li>\n<\/ol>\n<h3 data-start=\"5626\" data-end=\"5659\"><span class=\"ez-toc-section\" id=\"How_BIMI_Works_in_Mailjet\"><\/span><strong data-start=\"5630\" data-end=\"5659\">How BIMI Works in Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5660\" data-end=\"5800\">Mailjet supports BIMI provided your domain is fully authenticated. After setting up DMARC enforcement, you publish a BIMI record similar to:<\/p>\n<div class=\"contain-inline-size rounded-2xl corner-superellipse\/1.1 relative bg-token-sidebar-surface-primary\">\n<div class=\"sticky top-9\">\n<div class=\"absolute end-0 bottom-0 flex h-9 items-center pe-2\">\n<div class=\"bg-token-bg-elevated-secondary text-token-text-secondary flex items-center gap-4 rounded-sm px-2 font-sans text-xs\"><\/div>\n<\/div>\n<\/div>\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"whitespace-pre!\"><span class=\"hljs-keyword\">default<\/span>._bimi.yourdomain.com IN TXT <span class=\"hljs-string\">\"v=BIMI1; l=https:\/\/yourdomain.com\/logo.svg; a=https:\/\/yourdomain.com\/vmc.pem\"<\/span><br \/>\n<\/code><\/div>\n<\/div>\n<p data-start=\"5926\" data-end=\"6054\">While BIMI does not directly improve deliverability, it significantly boosts brand visibility, user trust, and email engagement.<\/p>\n<h2 data-start=\"6061\" data-end=\"6097\"><span class=\"ez-toc-section\" id=\"6_GDPR_Compliance_in_Mailjet\"><\/span><strong data-start=\"6064\" data-end=\"6097\">6. GDPR Compliance in Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6099\" data-end=\"6334\">Beyond authentication, compliance is a critical component of responsible email marketing. <strong data-start=\"6189\" data-end=\"6234\">GDPR (General Data Protection Regulation)<\/strong> is the European Union\u2019s data-protection framework that governs how personal information is handled.<\/p>\n<p data-start=\"6336\" data-end=\"6476\">Mailjet was one of the first major ESPs to become GDPR-compliant and still treats GDPR as the baseline for global data-protection standards.<\/p>\n<h3 data-start=\"6478\" data-end=\"6526\"><span class=\"ez-toc-section\" id=\"Key_GDPR_Principles_Supported_by_Mailjet\"><\/span><strong data-start=\"6482\" data-end=\"6526\">Key GDPR Principles Supported by Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4 data-start=\"6528\" data-end=\"6568\"><span class=\"ez-toc-section\" id=\"1_Data_Security_and_Encryption\"><\/span><strong data-start=\"6533\" data-end=\"6568\">1. Data Security and Encryption<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"6569\" data-end=\"6729\">Mailjet encrypts data in transit (TLS) and at rest. It also maintains secure storage, access controls, and incident-response processes to protect personal data.<\/p>\n<h4 data-start=\"6731\" data-end=\"6769\"><span class=\"ez-toc-section\" id=\"2_Data_Processing_Agreements\"><\/span><strong data-start=\"6736\" data-end=\"6769\">2. Data Processing Agreements<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"6770\" data-end=\"6916\">Mailjet provides a ready-made <strong data-start=\"6800\" data-end=\"6807\">DPA<\/strong> that outlines how personal data is processed, stored, and protected. It defines roles in the GDPR context:<\/p>\n<ul data-start=\"6917\" data-end=\"6993\">\n<li data-start=\"6917\" data-end=\"6952\">\n<p data-start=\"6919\" data-end=\"6952\">You are the <strong data-start=\"6931\" data-end=\"6950\">data controller<\/strong><\/p>\n<\/li>\n<li data-start=\"6953\" data-end=\"6993\">\n<p data-start=\"6955\" data-end=\"6993\">Mailjet acts as the <strong data-start=\"6975\" data-end=\"6993\">data processor<\/strong><\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"6995\" data-end=\"7047\"><span class=\"ez-toc-section\" id=\"3_Data_Minimization_and_Purpose_Limitation\"><\/span><strong data-start=\"7000\" data-end=\"7047\">3. Data Minimization and Purpose Limitation<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"7048\" data-end=\"7208\">Mailjet collects only essential data needed for email sending, analytics, and compliance. You maintain control over what subscriber data you upload and process.<\/p>\n<h4 data-start=\"7210\" data-end=\"7256\"><span class=\"ez-toc-section\" id=\"4_Subscriber_Consent_and_Preferences\"><\/span><strong data-start=\"7215\" data-end=\"7256\">4. Subscriber Consent and Preferences<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"7257\" data-end=\"7359\">GDPR requires clear, explicit consent for email communications. Mailjet supports compliance through:<\/p>\n<ul data-start=\"7360\" data-end=\"7461\">\n<li data-start=\"7360\" data-end=\"7390\">\n<p data-start=\"7362\" data-end=\"7390\">Double opt-in signup forms<\/p>\n<\/li>\n<li data-start=\"7391\" data-end=\"7415\">\n<p data-start=\"7393\" data-end=\"7415\">Contact segmentation<\/p>\n<\/li>\n<li data-start=\"7416\" data-end=\"7442\">\n<p data-start=\"7418\" data-end=\"7442\">Unsubscribe management<\/p>\n<\/li>\n<li data-start=\"7443\" data-end=\"7461\">\n<p data-start=\"7445\" data-end=\"7461\">Consent tracking<\/p>\n<\/li>\n<\/ul>\n<h4 data-start=\"7463\" data-end=\"7499\"><span class=\"ez-toc-section\" id=\"5_Data_Residency_in_the_EU\"><\/span><strong data-start=\"7468\" data-end=\"7499\">5. Data Residency in the EU<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"7500\" data-end=\"7641\">Mailjet offers <strong data-start=\"7515\" data-end=\"7573\">servers and data storage located in the European Union<\/strong>, an important factor for GDPR and broader international compliance.<\/p>\n<h4 data-start=\"7643\" data-end=\"7674\"><span class=\"ez-toc-section\" id=\"6_Data_Subject_Rights\"><\/span><strong data-start=\"7648\" data-end=\"7674\">6. Data Subject Rights<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p data-start=\"7675\" data-end=\"7819\">Individuals can request access, rectification, or deletion of their data. Mailjet provides mechanisms and support for fulfilling these requests.<\/p>\n<h2 data-start=\"7826\" data-end=\"7883\"><span class=\"ez-toc-section\" id=\"7_The_Combined_Impact_on_Deliverability_and_Trust\"><\/span><strong data-start=\"7829\" data-end=\"7883\">7. The Combined Impact on Deliverability and Trust<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"7885\" data-end=\"8035\">Using SPF, DKIM, DMARC, and BIMI is no longer optional\u2014email ecosystems now rely on them for security and sender reputation. When configured together:<\/p>\n<ul data-start=\"8037\" data-end=\"8307\">\n<li data-start=\"8037\" data-end=\"8078\">\n<p data-start=\"8039\" data-end=\"8078\"><strong data-start=\"8039\" data-end=\"8046\">SPF<\/strong> verifies who can send emails.<\/p>\n<\/li>\n<li data-start=\"8079\" data-end=\"8125\">\n<p data-start=\"8081\" data-end=\"8125\"><strong data-start=\"8081\" data-end=\"8089\">DKIM<\/strong> verifies email content integrity.<\/p>\n<\/li>\n<li data-start=\"8126\" data-end=\"8170\">\n<p data-start=\"8128\" data-end=\"8170\"><strong data-start=\"8128\" data-end=\"8137\">DMARC<\/strong> enforces alignment and policy.<\/p>\n<\/li>\n<li data-start=\"8171\" data-end=\"8241\">\n<p data-start=\"8173\" data-end=\"8241\"><strong data-start=\"8173\" data-end=\"8181\">BIMI<\/strong> enhances brand visibility after all security checks pass.<\/p>\n<\/li>\n<li data-start=\"8242\" data-end=\"8307\">\n<p data-start=\"8244\" data-end=\"8307\"><strong data-start=\"8244\" data-end=\"8252\">GDPR<\/strong> ensures responsible, lawful handling of personal data.<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8309\" data-end=\"8474\">Organizations using Mailjet benefit from strong deliverability, enhanced trust with mailbox providers, and a compliance framework that meets modern global standards.<\/p>\n<h2 data-start=\"227\" data-end=\"294\"><span class=\"ez-toc-section\" id=\"Case_Studies_Real-World_Deliverability_Outcomes_via_Mailjet\"><\/span><strong data-start=\"230\" data-end=\"294\">Case Studies: Real-World Deliverability Outcomes via Mailjet<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"296\" data-end=\"1024\">Email deliverability has become one of the most defining metrics in modern digital communication. Whether a brand is sending promotional campaigns, transactional alerts, or onboarding messages, reaching the inbox is the necessary first step to every conversion. Mailjet, with its focus on sender reputation, infrastructure reliability, and flexible APIs, has consistently positioned itself as a platform that can help organizations improve deliverability. To understand what this means in practice, it\u2019s useful to look at real-world case studies\u2014how companies of different sizes, markets, and technical sophistication have used Mailjet to achieve measurable improvements in inbox placement, engagement, and campaign performance.<\/p>\n<p data-start=\"1026\" data-end=\"1167\">Below are several representative case studies that illustrate how businesses have benefitted from Mailjet\u2019s deliverability-focused solutions.<\/p>\n<h2 data-start=\"1174\" data-end=\"1248\"><span class=\"ez-toc-section\" id=\"1_E-Commerce_Retailer_Boosts_Inbox_Placement_During_Seasonal_Peaks\"><\/span><strong data-start=\"1177\" data-end=\"1248\">1. E-Commerce Retailer Boosts Inbox Placement During Seasonal Peaks<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"1250\" data-end=\"1267\"><span class=\"ez-toc-section\" id=\"Challenge\"><\/span><strong data-start=\"1254\" data-end=\"1267\">Challenge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1268\" data-end=\"1823\">A mid-sized e-commerce retailer specializing in fashion and accessories faced chronic deliverability challenges during high-volume peak seasons\u2014primarily Black Friday, Cyber Monday, and the December holidays. Because they relied heavily on last-minute promotions, they often increased sending volume suddenly, which triggered spam-filtering flags from mailbox providers (MBPs). Their previous ESP lacked adaptive sending features, leading to severely throttled delivery rates and poor inbox placement during the moments when revenue potential was highest.<\/p>\n<h3 data-start=\"1825\" data-end=\"1849\"><span class=\"ez-toc-section\" id=\"Mailjet_Solution\"><\/span><strong data-start=\"1829\" data-end=\"1849\">Mailjet Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"1850\" data-end=\"1961\">The retailer migrated their marketing and transactional email streams to Mailjet and implemented several tools:<\/p>\n<ul data-start=\"1963\" data-end=\"2456\">\n<li data-start=\"1963\" data-end=\"2150\">\n<p data-start=\"1965\" data-end=\"2150\"><strong data-start=\"1965\" data-end=\"2006\">Dedicated IPs and reputation warming:<\/strong> Mailjet guided them through a structured warm-up plan, gradually increasing volume and strengthening sender reputation ahead of peak periods.<\/p>\n<\/li>\n<li data-start=\"2151\" data-end=\"2320\">\n<p data-start=\"2153\" data-end=\"2320\"><strong data-start=\"2153\" data-end=\"2197\">Segmentation and send-time optimization:<\/strong> They used Mailjet\u2019s segmentation tools to break their list into active and inactive segments, reducing the load on MBPs.<\/p>\n<\/li>\n<li data-start=\"2321\" data-end=\"2456\">\n<p data-start=\"2323\" data-end=\"2456\"><strong data-start=\"2323\" data-end=\"2347\">Real-time analytics:<\/strong> Using Mailjet\u2019s dashboards, they monitored bounce rates, user engagement, and technical errors in real time.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"2458\" data-end=\"2473\"><span class=\"ez-toc-section\" id=\"Outcome\"><\/span><strong data-start=\"2462\" data-end=\"2473\">Outcome<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2474\" data-end=\"2838\">Within two months, the retailer saw a <strong data-start=\"2512\" data-end=\"2550\">22% improvement in inbox placement<\/strong>. During the holiday season, instead of being throttled by MBPs, their promotional blasts delivered consistently within minutes. As a result, their holiday conversion rate increased, and they reported a <strong data-start=\"2753\" data-end=\"2788\">15% year-over-year revenue lift<\/strong> directly attributable to improved deliverability.<\/p>\n<p data-start=\"2840\" data-end=\"2988\">This case demonstrates how Mailjet&#8217;s infrastructure and deliverability coaching can stabilize sender reputation during volatile high-volume periods.<\/p>\n<h2 data-start=\"2995\" data-end=\"3093\"><span class=\"ez-toc-section\" id=\"2_SaaS_Company_Reduces_Onboarding_Drop-Off_via_Improved_Transactional_Email_Deliverability\"><\/span><strong data-start=\"2998\" data-end=\"3093\">2. SaaS Company Reduces Onboarding Drop-Off via Improved Transactional Email Deliverability<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"3095\" data-end=\"3112\"><span class=\"ez-toc-section\" id=\"Challenge-2\"><\/span><strong data-start=\"3099\" data-end=\"3112\">Challenge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3113\" data-end=\"3553\">A fast-growing SaaS company relied on automated onboarding sequences: account creation confirmations, password resets, feature-education messages, and weekly progress reminders. However, their transactional emails frequently landed in spam or were delayed, causing users to abandon onboarding prematurely. Frustrated users often contacted customer support for manual confirmations, which increased costs and decreased customer satisfaction.<\/p>\n<h3 data-start=\"3555\" data-end=\"3579\"><span class=\"ez-toc-section\" id=\"Mailjet_Solution-2\"><\/span><strong data-start=\"3559\" data-end=\"3579\">Mailjet Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"3580\" data-end=\"3721\">The company implemented Mailjet\u2019s <strong data-start=\"3614\" data-end=\"3641\">Transactional Email API<\/strong>, featuring high reliability and precise delivery timing. Key benefits included:<\/p>\n<ul data-start=\"3723\" data-end=\"4153\">\n<li data-start=\"3723\" data-end=\"3816\">\n<p data-start=\"3725\" data-end=\"3816\"><strong data-start=\"3725\" data-end=\"3752\">SMTP relay reliability:<\/strong> Low latency ensured near-instant delivery of critical emails.<\/p>\n<\/li>\n<li data-start=\"3817\" data-end=\"3963\">\n<p data-start=\"3819\" data-end=\"3963\"><strong data-start=\"3819\" data-end=\"3843\">Template management:<\/strong> Mailjet\u2019s templating system allowed non-technical teams to update onboarding messages without developer intervention.<\/p>\n<\/li>\n<li data-start=\"3964\" data-end=\"4153\">\n<p data-start=\"3966\" data-end=\"4153\"><strong data-start=\"3966\" data-end=\"3985\">Event tracking:<\/strong> The company used Mailjet\u2019s webhook system to monitor delivery, opens, and clicks, enabling them to identify users who never received or engaged with onboarding emails.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"4155\" data-end=\"4170\"><span class=\"ez-toc-section\" id=\"Outcome-2\"><\/span><strong data-start=\"4159\" data-end=\"4170\">Outcome<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4171\" data-end=\"4555\">The SaaS provider recorded an immediate <strong data-start=\"4211\" data-end=\"4265\">40% decrease in onboarding-related support tickets<\/strong>. More importantly, by ensuring that confirmation and activation emails reliably reached new customers, they improved onboarding completion by <strong data-start=\"4408\" data-end=\"4415\">18%<\/strong> within one quarter. This directly impacted revenue, lowering overall customer acquisition costs while increasing trial-to-paid conversions.<\/p>\n<p data-start=\"4557\" data-end=\"4715\">The case highlights how transactional deliverability\u2014often overlooked compared to promotional content\u2014can heavily influence customer experience and retention.<\/p>\n<h2 data-start=\"4722\" data-end=\"4816\"><span class=\"ez-toc-section\" id=\"3_Global_Nonprofit_Enhances_Engagement_by_30_Through_List_Hygiene_and_Personalization\"><\/span><strong data-start=\"4725\" data-end=\"4816\">3. Global Nonprofit Enhances Engagement by 30% Through List Hygiene and Personalization<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"4818\" data-end=\"4835\"><span class=\"ez-toc-section\" id=\"Challenge-3\"><\/span><strong data-start=\"4822\" data-end=\"4835\">Challenge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4836\" data-end=\"5178\">A global nonprofit organization relied on email newsletters to keep supporters informed about campaigns, fundraising drives, and volunteer opportunities. However, the nonprofit had grown rapidly, and its list management practices had not kept pace. Their email list, accumulated over years, contained inactive and stale addresses, leading to:<\/p>\n<ul data-start=\"5180\" data-end=\"5252\">\n<li data-start=\"5180\" data-end=\"5201\">\n<p data-start=\"5182\" data-end=\"5201\">High bounce rates<\/p>\n<\/li>\n<li data-start=\"5202\" data-end=\"5220\">\n<p data-start=\"5204\" data-end=\"5220\">Low engagement<\/p>\n<\/li>\n<li data-start=\"5221\" data-end=\"5252\">\n<p data-start=\"5223\" data-end=\"5252\">Declining sender reputation<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5254\" data-end=\"5356\">This contributed to many major mailbox providers filtering their updates into spam or promotions tabs.<\/p>\n<h3 data-start=\"5358\" data-end=\"5382\"><span class=\"ez-toc-section\" id=\"Mailjet_Solution-3\"><\/span><strong data-start=\"5362\" data-end=\"5382\">Mailjet Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5383\" data-end=\"5469\">Mailjet worked with the nonprofit to improve email list quality and content relevance:<\/p>\n<ul data-start=\"5471\" data-end=\"5833\">\n<li data-start=\"5471\" data-end=\"5586\">\n<p data-start=\"5473\" data-end=\"5586\"><strong data-start=\"5473\" data-end=\"5496\">List hygiene tools:<\/strong> Unengaged and invalid addresses were removed or segmented into re-engagement campaigns.<\/p>\n<\/li>\n<li data-start=\"5587\" data-end=\"5735\">\n<p data-start=\"5589\" data-end=\"5735\"><strong data-start=\"5589\" data-end=\"5609\">Personalization:<\/strong> Using Mailjet\u2019s dynamic content tools, the nonprofit tailored messages by region, donation history, and volunteer interest.<\/p>\n<\/li>\n<li data-start=\"5736\" data-end=\"5833\">\n<p data-start=\"5738\" data-end=\"5833\"><strong data-start=\"5738\" data-end=\"5754\">A\/B testing:<\/strong> Subject lines, layouts, and content blocks were tested to maximize engagement.<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"5835\" data-end=\"5850\"><span class=\"ez-toc-section\" id=\"Outcome-3\"><\/span><strong data-start=\"5839\" data-end=\"5850\">Outcome<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"5851\" data-end=\"5870\">After three months:<\/p>\n<ul data-start=\"5872\" data-end=\"5987\">\n<li data-start=\"5872\" data-end=\"5907\">\n<p data-start=\"5874\" data-end=\"5907\">Bounce rates dropped by <strong data-start=\"5898\" data-end=\"5905\">65%<\/strong><\/p>\n<\/li>\n<li data-start=\"5908\" data-end=\"5943\">\n<p data-start=\"5910\" data-end=\"5943\">Open rates increased by <strong data-start=\"5934\" data-end=\"5941\">30%<\/strong><\/p>\n<\/li>\n<li data-start=\"5944\" data-end=\"5987\">\n<p data-start=\"5946\" data-end=\"5987\">Click-through rates improved by <strong data-start=\"5978\" data-end=\"5985\">24%<\/strong><\/p>\n<\/li>\n<\/ul>\n<p data-start=\"5989\" data-end=\"6259\">Most crucially, their inbox placement improved dramatically, restoring effective communication with their donor base. This ultimately allowed them to run a major fundraising campaign that exceeded its target by <strong data-start=\"6200\" data-end=\"6207\">12%<\/strong>, thanks in large part to improved email visibility.<\/p>\n<p data-start=\"6261\" data-end=\"6397\">This case illustrates how proper list hygiene and personalization using Mailjet\u2019s tools can revitalize sender reputation and engagement.<\/p>\n<h2 data-start=\"6404\" data-end=\"6508\"><span class=\"ez-toc-section\" id=\"4_Marketplace_Platform_Harmonizes_Cross-Team_Email_Sending_with_Mailjets_Collaboration_Features\"><\/span><strong data-start=\"6407\" data-end=\"6508\">4. Marketplace Platform Harmonizes Cross-Team Email Sending with Mailjet\u2019s Collaboration Features<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 data-start=\"6510\" data-end=\"6527\"><span class=\"ez-toc-section\" id=\"Challenge-4\"><\/span><strong data-start=\"6514\" data-end=\"6527\">Challenge<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6528\" data-end=\"6743\">A large online marketplace had multiple teams\u2014marketing, seller onboarding, buyer operations, security, and product\u2014sending various email campaigns. The absence of centralized email management caused several issues:<\/p>\n<ul data-start=\"6745\" data-end=\"6942\">\n<li data-start=\"6745\" data-end=\"6770\">\n<p data-start=\"6747\" data-end=\"6770\">Inconsistent branding<\/p>\n<\/li>\n<li data-start=\"6771\" data-end=\"6813\">\n<p data-start=\"6773\" data-end=\"6813\">Overlapping sends causing user fatigue<\/p>\n<\/li>\n<li data-start=\"6814\" data-end=\"6877\">\n<p data-start=\"6816\" data-end=\"6877\">Deliverability issues from high volume without coordination<\/p>\n<\/li>\n<li data-start=\"6878\" data-end=\"6942\">\n<p data-start=\"6880\" data-end=\"6942\">Risk of accidental policy violations due to fragmented control<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"6944\" data-end=\"6968\"><span class=\"ez-toc-section\" id=\"Mailjet_Solution-4\"><\/span><strong data-start=\"6948\" data-end=\"6968\">Mailjet Solution<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"6969\" data-end=\"7041\">The marketplace adopted Mailjet\u2019s <strong data-start=\"7003\" data-end=\"7029\">collaboration features<\/strong>, including:<\/p>\n<ul data-start=\"7043\" data-end=\"7358\">\n<li data-start=\"7043\" data-end=\"7145\">\n<p data-start=\"7045\" data-end=\"7145\"><strong data-start=\"7045\" data-end=\"7074\">Role-based access control<\/strong>, ensuring only authorized team members edited or scheduled campaigns<\/p>\n<\/li>\n<li data-start=\"7146\" data-end=\"7199\">\n<p data-start=\"7148\" data-end=\"7199\"><strong data-start=\"7148\" data-end=\"7175\">Shared template gallery<\/strong> for brand consistency<\/p>\n<\/li>\n<li data-start=\"7200\" data-end=\"7266\">\n<p data-start=\"7202\" data-end=\"7266\"><strong data-start=\"7202\" data-end=\"7233\">Email builder collaboration<\/strong>, allowing real-time co-editing<\/p>\n<\/li>\n<li data-start=\"7267\" data-end=\"7358\">\n<p data-start=\"7269\" data-end=\"7358\"><strong data-start=\"7269\" data-end=\"7300\">Unified analytics dashboard<\/strong> to track deliverability and engagement across departments<\/p>\n<\/li>\n<\/ul>\n<h3 data-start=\"7360\" data-end=\"7375\"><span class=\"ez-toc-section\" id=\"Outcome-4\"><\/span><strong data-start=\"7364\" data-end=\"7375\">Outcome<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"7376\" data-end=\"7404\">Within the first six months:<\/p>\n<ul data-start=\"7406\" data-end=\"7646\">\n<li data-start=\"7406\" data-end=\"7478\">\n<p data-start=\"7408\" data-end=\"7478\">Sender reputation stabilized, as teams coordinated volume and timing<\/p>\n<\/li>\n<li data-start=\"7479\" data-end=\"7550\">\n<p data-start=\"7481\" data-end=\"7550\">Duplicate or conflicting messages were reduced by more than <strong data-start=\"7541\" data-end=\"7548\">50%<\/strong><\/p>\n<\/li>\n<li data-start=\"7551\" data-end=\"7646\">\n<p data-start=\"7553\" data-end=\"7646\">Overall email engagement rose by <strong data-start=\"7586\" data-end=\"7593\">12%<\/strong>, attributed to better timing and messaging coherence<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"7648\" data-end=\"7821\">By unifying email operations under Mailjet, the company retained the agility of multiple sending teams while eliminating the chaos that previously undermined deliverability.<\/p>\n<h2 data-start=\"7828\" data-end=\"7845\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong data-start=\"7831\" data-end=\"7845\">Conclusion<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"7847\" data-end=\"8185\">These case studies show that Mailjet\u2019s value extends beyond simple email sending. Whether a business needs to stabilize high-volume campaigns, improve transactional message reliability, clean up lists, personalize content, or unify complex email operations, Mailjet provides the infrastructure and tools necessary for high deliverability.<\/p>\n<p data-start=\"8187\" data-end=\"8330\">Across industries\u2014retail, SaaS, nonprofit, and multi-team enterprise organizations\u2014Mailjet consistently drives measurable improvements such as:<\/p>\n<ul data-start=\"8332\" data-end=\"8483\">\n<li data-start=\"8332\" data-end=\"8361\">\n<p data-start=\"8334\" data-end=\"8361\">Increased inbox placement<\/p>\n<\/li>\n<li data-start=\"8362\" data-end=\"8383\">\n<p data-start=\"8364\" data-end=\"8383\">Higher engagement<\/p>\n<\/li>\n<li data-start=\"8384\" data-end=\"8408\">\n<p data-start=\"8386\" data-end=\"8408\">Reduced bounce rates<\/p>\n<\/li>\n<li data-start=\"8409\" data-end=\"8438\">\n<p data-start=\"8411\" data-end=\"8438\">Streamlined collaboration<\/p>\n<\/li>\n<li data-start=\"8439\" data-end=\"8483\">\n<p data-start=\"8441\" data-end=\"8483\">Greater revenue and campaign performance<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"8485\" data-end=\"8743\">Ultimately, deliverability is not just a technical metric\u2014it is a business outcome. And these real-world examples demonstrate how Mailjet helps organizations transform their communication strategies into reliable, performant, and user-centered email systems.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Email remains one of the most powerful communication channels for organizations seeking to reach customers, nurture leads, and build long-term relationships. However, the success&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[270],"tags":[],"class_list":["post-17936","post","type-post","status-publish","format-standard","hentry","category-digital-marketing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Mailjet deliverability performance - Lite14 Tools &amp; Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lite14.net\/blog\/2025\/12\/06\/mailjet-deliverability-performance\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mailjet deliverability performance - Lite14 Tools &amp; Blog\" \/>\n<meta property=\"og:description\" content=\"Introduction Email remains one of the most powerful communication channels for organizations seeking to reach customers, nurture leads, and build long-term relationships. 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