{"id":19025222,"date":"2026-09-21T10:57:01","date_gmt":"2026-09-21T10:57:01","guid":{"rendered":"https:\/\/wordpress.org\/support\/topic\/technical-confirmation-needed-mailjet-custom-smtp-headers\/"},"modified":"2026-09-21T10:57:01","modified_gmt":"2026-09-21T10:57:01","slug":"technical-confirmation-needed-mailjet-custom-smtp-headers","status":"publish","type":"topic","link":"https:\/\/wordpress.org\/support\/topic\/technical-confirmation-needed-mailjet-custom-smtp-headers\/","title":{"rendered":"Technical confirmation needed: Mailjet custom SMTP headers"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Hello,<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thank you for your reply.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I understand that this requires confirmation from the technical support team.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Could you please check specifically how MailPoet handles custom SMTP headers when using an external SMTP provider?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">My setup is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">MailPoet \u2192 Custom SMTP \u2192 Mailjet<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I need MailPoet to send these two headers on transactional emails:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X-Mailjet-TrackOpen: 0<br \/>X-Mailjet-TrackClick: 0<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mailjet has confirmed that these headers are the supported way to disable open and click tracking on individual SMTP emails.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Could your technical team please confirm the following:<\/p>\n\n\n\n<ol>\n<li>Does MailPoet preserve custom headers added to WordPress transactional emails when those emails are routed through MailPoet&#8217;s configured SMTP method?<\/li>\n\n\n\n<li>Does MailPoet remove or rebuild the email headers before passing the message to the SMTP provider?<\/li>\n\n\n\n<li>Is there an existing MailPoet filter or hook that allows adding custom SMTP headers specifically to transactional\/site emails?<\/li>\n\n\n\n<li>If MailPoet does not support this, is it possible to configure MailPoet so that:\n<ul>\n<li>MailPoet newsletters continue to use Mailjet SMTP<\/li>\n\n\n\n<li>WordPress transactional emails bypass MailPoet and are sent through a separate SMTP configuration?<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The goal is simply:<\/p>\n\n\n\n<ul>\n<li>Marketing emails: Mailjet tracking enabled<\/li>\n\n\n\n<li>Transactional emails: Mailjet tracking disabled<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Mailjet support has confirmed that this separation can be achieved through the X-Mailjet headers, provided the SMTP application passes them correctly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thank you for checking this with the technical team.<\/p>\n","protected":false},"template":"","class_list":["post-19025222","topic","type-topic","status-publish","hentry","topic-tag-header","topic-tag-mailjet"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19025222","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic"}],"about":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/topic\/19025222\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.org\/support\/wp-json\/wp\/v2\/media?parent=19025222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}