Test post to see if DMARC mitigation works for us.
On Thu, 18 Jul 2019 15:43:41 -0500 Mike Kaply <[email protected]> wrote: > 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" > > _______________________________________________ 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"
