<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/xhtml; charset=utf-8">
</head>
<body><div style="font-family: sans-serif;"><div class="markdown" style="white-space: normal;">
<p dir="auto">Dear All,</p>
<p dir="auto">Thanks for the elaborate answer.</p>
<p dir="auto">Indeed I din’t think about DMARC, SPF & DKIM and it makes sense indeed.<br>
This also explains why following a post I get a my mail from the list to the list, cc me.</p>
<p dir="auto">For those intrested</p>
<pre style="margin-left: 15px; margin-right: 15px; padding: 5px; background-color: #F7F7F7; border-radius: 5px 5px 5px 5px; overflow-x: auto; max-width: 90vw;"><code style="margin: 0 0; border-radius: 3px; background-color: #F7F7F7; padding: 0px;">From: MM_Arc via mailmate <mailmate@lists.freron.com>
Reply-To: MailMate Users <mailmate@lists.freron.com>
Cc: MM_Arc <mailmate@arcict.com>
Sender: "mailmate" <mailmate-bounces@lists.freron.com>
</code></pre>
<p dir="auto">Many thanks for the info</p>
<p dir="auto">Regards</p>
<p dir="auto">Marc</p>
<p dir="auto">On 20 Dec 2023, at 4:55, Quinn Comendant via mailmate wrote:</p>
<blockquote style="margin: 0 0 5px; padding-left: 5px; border-left: 2px solid #777777; color: #777777;">
<p dir="auto">On 19 Dec 2023, at 16:06, Bill Cole wrote:</p>
<blockquote style="margin: 0 0 5px; padding-left: 5px; border-left: 2px solid #777777; border-left-color: #999999; color: #999999;">
<p dir="auto">Mailman modifies the "From" header of messages sent from domains which would otherwise be widely rejected […]<br>
I won't try to pick apart the precise details for this list. Perhaps Benny can explain the specific rules.</p>
</blockquote>
<p dir="auto">Mailman checks the DMARC policy published to the DNS TXT records of the domain in the "From" header of the original message. If the policy is 'p=reject' or 'p=quarantine', Mailman may modify the "From" header to use the list's email address or the server's hostname to prevent rejection due to DMARC, SPF, or DKIM checks.</p>
<p dir="auto">It doesn't treat all senders the same because some people self-host their email domain and don't use DKIM or SPF.</p>
<p dir="auto">Quinn</p>
<hr style="border: 0; height: 1px; background: #333; background-image: linear-gradient(to right, #ccc, #333, #ccc);">
<p dir="auto">mailmate mailing list<br>
<a href="mailto:mailmate@lists.freron.com" style="color: #777777;">mailmate@lists.freron.com</a><br>
<a href="https://lists.freron.com/listinfo/mailmate" style="color: #777777;">https://lists.freron.com/listinfo/mailmate</a></p>
</blockquote>
</div>
</div>
</body>
</html>