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<p>Hello everybody,</p>
<p>I'm the "<i>cuplrit</i>" of the situation and if there is any way
I can help you, please let me know!</p>
<p>As I've already explained to Stefano that my domain (smz.it)
DMARC policy was strictly enforcing SPF and thus mail sent from
shenron.openstreetmap.org on my behalf was rejected and apparently
that caused quite a mess (<i>which I'm sorry for...</i>).</p>
<p>I myself mange several mailman based mailing lists and the only
way I've so far found to fix the issue is to activate the
"Reply-to munging" option in the list "General" configuration:
with that option active the sender of redistributed messages is
altered to the mailing list address itself (<i>as a by-effect that
also makes easier to reply to the list and not just to the OP...</i>).</p>
<p>When that option is active messages sent through the mailing list
will have the "From:" field altered so that it will appear as
something like:</p>
<blockquote>
<p>"From: Sergio Manzi via openstreetmap list - italiano
<a class="moz-txt-link-rfc2396E" href="mailto:talk-it@openstreetmap.org"><talk-it@openstreetmap.org></a>"</p>
</blockquote>
<p>... and the "Reply-To" field will be set as:</p>
<blockquote>
<p>"Reply-To: Sergio Manzi <a class="moz-txt-link-rfc2396E" href="mailto:smz@smz.it"><smz@smz.it></a>, openstreetmap list
- italiano <a class="moz-txt-link-rfc2396E" href="mailto:talk-it@openstreetmap.org"><talk-it@openstreetmap.org></a>"<br>
</p>
</blockquote>
<p>... and that will ensure that my DMARC policy will not be
considered for messages relayed by the list.<br>
</p>
<p>In the meanwhile I've made my DMARC permissive (p=none) and added
shenron.openstreetmap.org in my SPF configuration, but I lean to
consider this just a temporary solution, until the issue is
addressed in a more definitive way.</p>
<p>Again, please let me know if I can be of any help...</p>
<p>Regards,</p>
<p>Sergio Manzi<br>
</p>
<br>
<div class="moz-cite-prefix">On 2018-09-06 10:49, Stefano wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAMePwhCfPgLAWdeais6zE-Js81gVnjHTbOYMWE4fxTE0wOxKGA@mail.gmail.com">
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<div dir="ltr">Hello,
<div>I had a problem on talk-it that caused a mass
unsubscription, which was caused apparently from a DMARC
policy.</div>
<div>I was asked if it can be possible to activate the "Reply-to
munging" option in Mailman to allow domains which enforce
these policies to subscribe correctly.</div>
<div><br>
</div>
<div>I add in copy the user who reported the problem (sergio)</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Stefano</div>
<div>(talk-it administrator)</div>
</div>
</blockquote>
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