{"id":6333,"date":"2025-09-09T06:43:33","date_gmt":"2025-09-08T23:43:33","guid":{"rendered":"https:\/\/saidwp.com\/blog\/?p=6333"},"modified":"2025-09-09T06:43:33","modified_gmt":"2025-09-08T23:43:33","slug":"billionmail-v4-4-update","status":"publish","type":"post","link":"https:\/\/saidwp.com\/blog\/en\/billionmail-v4-4-update\/","title":{"rendered":"BillionMail v4.4 Update: Outbound IP Binding &amp; Stability"},"content":{"rendered":"\n<p>Not long ago, BillionMail released version 4.3 with major improvements such as <em>Spintax<\/em> support for dynamic content, core log management optimizations, and fixes for stalled campaign.<\/p>\n\n\n\n<p>That release focused on making email campaigns more flexible and efficient.<\/p>\n\n\n\n<p>Now, BillionMail continues its development journey with version 4.4, bringing updates that focus on system stability, stronger security, and more granular domain-level control.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What\u2019s New in BillionMail v4.4<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Outbound IP Binding<\/strong><\/h3>\n\n\n\n<p>The highlight of this release is Outbound IP Binding.<\/p>\n\n\n\n<p>This feature allows <strong>dedicated outbound IP allocation for each domain<\/strong> when the server has multiple IP addresses. It helps each domain maintain its own IP reputation, which is crucial for improving email deliverability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Core Optimizations <\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Postfix configuration enhancement<\/strong><strong><br><\/strong> Optimized relay-related settings in the main.cf configuration file and ensured proper SMTP hash file availability, significantly improving email delivery stability.<br><\/li>\n\n\n\n<li><strong>Security reinforcement<\/strong><strong><br><\/strong> Removed arbitrary file read\/download functions from the interface, reinforcing system-level security.<br><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Bug Fixes <\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Database constraint resolution<\/strong><strong><br><\/strong> Fixed <em>foreign key constraint<\/em> issues in the email_tasks table that previously caused database operation errors.<br><\/li>\n\n\n\n<li><strong>Reverse proxy compatibility<\/strong><strong><br><\/strong> Corrected reverse proxy configuration to ensure proper behavior when bypassing language detection and accessing test APIs, with better handling of reverse proxy anomalies.<br><\/li>\n\n\n\n<li><strong>SSL certificate maintenance<\/strong><strong><br><\/strong> Fixed issues with Let\u2019s Encrypt certificate automatic renewal failures.<br><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h3>\n\n\n\n<p>The BillionMail v4.4 release demonstrates the project\u2019s consistency in development: from v4.3\u2019s focus on campaign flexibility and log optimizations, to v4.4\u2019s introduction of domain-specific outbound IPs, stronger security measures, and crucial bug fixes in the database and SSL modules.<\/p>\n\n\n\n<p>For users running self-hosted email servers, this combination of updates is critical to ensure long-term stability, improved security, and optimal email deliverability.<\/p>\n\n\n\n<p><strong>Also read the previous series:<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/saidwp.com\/blog\/server\/update-billionmail-v4-3\/\"><span style=\"text-decoration: underline;\">Update BillionMail v4.3 \u2197<\/span><\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/saidwp.com\/blog\/tag\/billionmail\/\"><span style=\"text-decoration: underline;\">All BillionMail series \u2197<\/span><\/a><\/p>\n\n\n\n<p><strong>Reference:<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/github.com\/aaPanel\/BillionMail\/releases\/tag\/v4.4\"><span style=\"text-decoration: underline;\">https:\/\/github.com\/aaPanel\/BillionMail\/releases\/tag\/v4.4<\/span><\/a><\/p>\n\n\n\n<p>Need help with setup or migration? Just head over to <strong>saidwp.com\/jasa<\/strong> and let the technical stuff be handled from start to finish.<\/p>\n\n\n\n<p class=\"has-text-align-center has-white-color has-text-color has-background has-link-color wp-elements-9d9af40051e99b64b343df908a58a236\" style=\"background-color:#272590\"><strong><a href=\"https:\/\/saidwp.com\/jasa\/\" target=\"_blank\" rel=\"noreferrer noopener\">Order Jasa SaidWP <strong><\/strong><\/a><strong><a href=\"https:\/\/github.com\/nimbusdotstorage\/Nimbus\" target=\"_blank\" rel=\"noreferrer noopener\">\u2197<\/a><\/strong> <\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Not long ago, BillionMail released version 4.3 with major improvements such as Spintax support for dynamic content, core log management optimizations, and fixes for stalled campaign. That release focused on making email campaigns more flexible and efficient. Now, BillionMail continues its development journey with version 4.4, bringing updates that focus on system stability, stronger security, [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":6329,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[244],"tags":[138,139,140],"class_list":["post-6333","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-en","tag-billionmail","tag-mailserver","tag-self-hosted"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>BillionMail v4.4 Update: Outbound IP Binding &amp; Stability - Blog | SaidWP<\/title>\n<meta name=\"description\" content=\"BillionMail v4.4 adds outbound IP binding, stronger security, Postfix optimization, and key bug fixes for better stability.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/saidwp.com\/blog\/en\/billionmail-v4-4-update\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"BillionMail v4.4 Update: Outbound IP Binding &amp; 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