[Mozilla Enterprise] ESR mailing list forwarding gives rise to DMARC "failures"

Don Wright wmail at wricomp.com
Sun Jul 14 21:45:59 UTC 2019


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



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