I've updated the list settings to Munge From -- applies the from_is_list Munge From transformation to these messages.
for the action to take when anyone posts to the list from a domain with a DMARC Reject/Quarantine Policy. Hopefully this solves the problem without affecting too many other people. Mike Kaply On Sun, Jul 14, 2019 at 10:11 PM Paul Kosinski <[email protected]> wrote: > Yes, I know that SPF, DKIM and DMARC can cause problems with mailing > lists, but people have been working on it for years. I just thought that > Mozilla was sophisticated enough to have implemented a workaround. > > The ISC BIND users mailing list, for example, uses Mailman and in their > configuration the DMARC handler, modifies the "From:" address and adds > "Reply-To:" like so: > > Paul Kosinski via bind-users <[email protected]> > Reply-to: Paul Kosinski <[email protected]> > > The ClamAV users mailing list does something similar, also changing > "From:", adding "Reply-to:", but also adding a "Cc:" like so: > > From: Paul Kosinski via clamav-users <[email protected]> > Reply-To: ClamAV users ML <[email protected]> > Cc: Paul Kosinski <[email protected]> > > Topicbox also uses the "From:" "via" workaround. It's a shame that > Mozilla doesn't do something to mitigate its DMARC problem. > > P.S. Since DMARC info is supplied by the DNS server and applies to the > whole domain, I don't see offhand what to do that would accommodate > Mozilla's rather lame mailing list mechanism. > > > > On Sun, 14 Jul 2019 16:45:59 -0500 > Don Wright <[email protected]> wrote: > > > Paul Kosinski wrote: > > >Here's another example of a DMARC "failure" when mail (from me) is > > >passed on to an ESR subscriber. > > > > > > DMARC is fundamentally broken[1] with regard to mailing lists as it > > only checks the From: and not the Sender: field. Mitigating > > DMARC-induced problems is a frequent topic on the mailman-users > > support mailing list.[2] > > > > > > [1] https://en.wikipedia.org/wiki/DMARC#Mailing_lists > > [2] https://mail.python.org/mailman/listinfo/mailman-users > _______________________________________________ > Enterprise mailing list > [email protected] > https://mail.mozilla.org/listinfo/enterprise > > To unsubscribe from this list, please visit > https://mail.mozilla.org/listinfo/enterprise or send an email to > [email protected] with a subject of "unsubscribe" >
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