{"id":8849,"date":"2025-05-06T07:19:37","date_gmt":"2025-05-06T07:19:37","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=8849"},"modified":"2026-03-30T08:47:23","modified_gmt":"2026-03-30T08:47:23","slug":"mta-sta","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/mta-sta","title":{"rendered":"MTA STA"},"content":{"rendered":"\n<p>MTA-STA Reporting Services : <a href=\"https:\/\/dmarcvendors.com\/#DMARC_Analytics\">https:\/\/dmarcvendors.com\/#DMARC_Analytics<\/a><\/p>\n\n\n\n<p><strong>365<\/strong><\/p>\n\n\n\n<p><a href=\"https:\/\/mta-sts.microsoft.com\/.well-known\/mta-sts.txt\">https:\/\/mta-sts.microsoft.com\/.well-known\/mta-sts.txt<\/a><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">version: STSv1\nmode: enforce\nmx: *.f-v1.mx.microsoft\nmx: *.mail.protection.outlook.com\nmax_age: 604800<\/code><\/pre>\n\n\n\n<p>In <strong>Gmail <\/strong>you can get these values from Google Workspace admin : <a href=\"https:\/\/admin.google.com\/ac\/apps\/cs\/diagnostic\">https:\/\/admin.google.com\/ac\/apps\/cs\/diagnostic<\/a><\/p>\n\n\n\n<p>Host the following file mta-sts.txt via <a href=\"https:\/\/www.reddit.com\/r\/sysadmin\/comments\/1itjv3m\/free_mtasts_hosting_via_cloudflare_pages\/\" data-type=\"link\" data-id=\"https:\/\/www.reddit.com\/r\/sysadmin\/comments\/1itjv3m\/free_mtasts_hosting_via_cloudflare_pages\/\">Cloudflare<\/a> or <a href=\"https:\/\/github.com\/jpawlowski\/mta-sts.template\" data-type=\"link\" data-id=\"https:\/\/github.com\/jpawlowski\/mta-sts.template\">Github Pages<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/mta-sts.pariswells.com\/.well-known\/mta-sts.txt\">https:\/\/mta-sts.pariswells.com\/.well-known\/mta-sts.txt<\/a><\/p>\n\n\n\n<p>I used github <a href=\"https:\/\/github.com\/pariswells\/mta-sts\/tree\/main\">https:\/\/github.com\/pariswells\/mta-sts\/tree\/main<\/a><\/p>\n\n\n\n<p>DNS <\/p>\n\n\n\n<p>the&nbsp;<code>id<\/code>&nbsp;tag contains an alphanumeric string up to 32 alphanumerics long, used to track policy (see below) updates; it must uniquely identify a given instance of a policy, such that senders can determine when the policy has been updated by comparing to the id of a previously seen policy.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">_mta-sts.domain.com -&gt; v=STSv1;id=1746508693955;\n_smtp._tls.domain.com -&gt; v=TLSRPTv1;rua=mailto:smtp-tls-reports@pariswells.com;<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\">Gmail\n\nSuggested Configuration:\nv=STSv1;id=1746508693955;\nMTA-STS Policy Diagnostic:\nNot Configured\n\nSuggested Configuration:\nversion: STSv1\nmode: testing\nmx: aspmx.l.google.com\nmx: aspmx2.googlemail.com\nmx: aspmx3.googlemail.com\nmx: alt1.aspmx.l.google.com\nmx: alt2.aspmx.l.google.com\nmax_age: 604800\nReporting Policy Diagnostic:\nNot Configured\n\nSuggested Configuration:\nv=TLSRPTv1;rua=mailto:smtp-tls-reports@pariswells.com;<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>mode can be&nbsp;<code>enforce<\/code>,&nbsp;<code>testing<\/code>, or&nbsp;<code>none<\/code>:\n<ul class=\"wp-block-list\">\n<li>enforce mode: the sending server must not deliver the message to a receiving host that fails MX matching or certificate validation or that does not support STARTTLS;<\/li>\n\n\n\n<li>testing mode: the sending server delivers the message; if TLS reporting is implemented, the sending server also sends a TLS report to the specified email addresses indicating policy application failure, when the receiving host fails MX matching or certificate validation or does not support STARTTLS;<\/li>\n\n\n\n<li>none mode: the sending server treats the policy domain as though it does not have any active policy;<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Outbound can be tested as well<\/p>\n\n\n\n<p><a href=\"https:\/\/techcommunity.microsoft.com\/blog\/exchange\/announcing-smtp-dane--mta-sts-connector-modes-in-exchange-online\/4501005\">https:\/\/techcommunity.microsoft.com\/blog\/exchange\/announcing-smtp-dane&#8211;mta-sts-connector-modes-in-exchange-online\/4501005<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>MTA-STA Reporting Services : https:\/\/dmarcvendors.com\/#DMARC_Analytics 365 https:\/\/mta-sts.microsoft.com\/.well-known\/mta-sts.txt In Gmail you can get these values from Google Workspace admin : https:\/\/admin.google.com\/ac\/apps\/cs\/diagnostic Host the following file mta-sts.txt via Cloudflare [&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-8849","post","type-post","status-publish","format-standard","hentry","category-research"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/8849","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/comments?post=8849"}],"version-history":[{"count":9,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/8849\/revisions"}],"predecessor-version":[{"id":9519,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/8849\/revisions\/9519"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=8849"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=8849"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=8849"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}