{"id":543,"date":"2026-06-08T00:00:00","date_gmt":"2026-06-08T00:00:00","guid":{"rendered":"https:\/\/wordpress.securinsight.ca\/index.php\/2026\/06\/08\/email-service-authenticated-smtp-submission-now-available-in-beta\/"},"modified":"2026-06-08T00:00:00","modified_gmt":"2026-06-08T00:00:00","slug":"email-service-authenticated-smtp-submission-now-available-in-beta","status":"publish","type":"post","link":"https:\/\/wordpress.securinsight.ca\/index.php\/2026\/06\/08\/email-service-authenticated-smtp-submission-now-available-in-beta\/","title":{"rendered":"Email Service &#8211; Authenticated SMTP submission now available in beta"},"content":{"rendered":"<p>You can now send emails through <strong>Cloudflare Email Service<\/strong> using authenticated <a href=\"https:\/\/developers.cloudflare.com\/email-service\/api\/send-emails\/smtp\/\">SMTP submission<\/a> on <code>smtp.mx.cloudflare.net:465<\/code>. SMTP joins the <a href=\"https:\/\/developers.cloudflare.com\/email-service\/api\/send-emails\/rest-api\/\">REST API<\/a> and the <a href=\"https:\/\/developers.cloudflare.com\/email-service\/api\/send-emails\/workers-api\/\">Workers binding<\/a> as a third way to send transactional email \u2014 useful for existing applications that already speak SMTP and language-native SMTP libraries (Nodemailer, <code>smtplib<\/code>, PHPMailer, JavaMail).<\/p>\n<table>\n<thead>\n<tr>\n<th>Setting<\/th>\n<th>Value<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Host<\/td>\n<td><code>smtp.mx.cloudflare.net<\/code><\/td>\n<\/tr>\n<tr>\n<td>Port<\/td>\n<td><code>465<\/code> (implicit TLS)<\/td>\n<\/tr>\n<tr>\n<td>AUTH<\/td>\n<td><code>PLAIN<\/code> or <code>LOGIN<\/code><\/td>\n<\/tr>\n<tr>\n<td>Username<\/td>\n<td><code>api_token<\/code><\/td>\n<\/tr>\n<tr>\n<td>Password<\/td>\n<td>A Cloudflare API token (account-owned or user-owned) with <strong>Email Sending: Edit<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Submissions enter the same delivery pipeline as the REST API and Workers binding: identical <a href=\"https:\/\/developers.cloudflare.com\/email-service\/platform\/limits\/\">limits<\/a>, automatic DKIM and ARC signing, and shared dashboard logs.<\/p>\n<p>Send your first email with a single command:<\/p>\n<div>\n<figure>\n<pre data-language=\"sh\"><code class=\"language-sh\"><div><div><span>curl<\/span><span> <\/span><span>--ssl-reqd<\/span><span> <\/span><span><\/span><\/div><\/div><div><div><span>  <\/span><span>--url<\/span><span> <\/span><span>\"smtps:\/\/smtp.mx.cloudflare.net:465\"<\/span><span> <\/span><span><\/span><\/div><\/div><div><div><span>  <\/span><span>--user<\/span><span> <\/span><span>\"api_token:&lt;API_TOKEN&gt;\"<\/span><span> <\/span><span><\/span><\/div><\/div><div><div><span>  <\/span><span>--mail-from<\/span><span> <\/span><span>\"welcome@yourdomain.com\"<\/span><span> <\/span><span><\/span><\/div><\/div><div><div><span>  <\/span><span>--mail-rcpt<\/span><span> <\/span><span>\"user@example.com\"<\/span><span> <\/span><span><\/span><\/div><\/div><div><div><span>  <\/span><span>--upload-file<\/span><span> <\/span><span>mail.txt<\/span><\/div><\/div><\/code><\/pre>\n<div>\n<div><\/div>\n<\/div>\n<\/figure>\n<\/div>\n<p>Refer to the <a href=\"https:\/\/developers.cloudflare.com\/email-service\/api\/send-emails\/smtp\/\">SMTP reference<\/a> for authentication details, response codes, and language-specific examples.<\/p>","protected":false},"excerpt":{"rendered":"<p>You can now send emails through Cloudflare Email Service using authenticated SMTP submission on smtp.mx.cloudflare.net:465. SMTP joins the REST API and the Workers binding as a third way to send transactional email \u2014 useful for existing applications that already speak SMTP and language-native SMTP libraries (Nodemailer, smtplib, PHPMailer, JavaMail). Setting Value Host smtp.mx.cloudflare.net Port 465 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-543","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/posts\/543","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/comments?post=543"}],"version-history":[{"count":0,"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/posts\/543\/revisions"}],"wp:attachment":[{"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/media?parent=543"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/categories?post=543"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wordpress.securinsight.ca\/index.php\/wp-json\/wp\/v2\/tags?post=543"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}