Kevin Fenzi writes:
On 4/30/19 4:46 AM, Vitaly Zaitsev wrote:
Hello all!
Currently Fedora mailing lists use "From" field from original messages and if sender's domain use DMARC=reject policy, mailing lists subscribers cannot receive any messages from such users because their MX servers follow DMARC procedure and drop them.
Which explains why DMARC is horrible. ;)
No, it explains why p=reject domains that post to mailing lists are horrible. DMARC is a good thing when used properly.
Previously I opened ticket in Fedora Infra[1].
Someone need to fix this because more and more mailing servers starts enforcing DMARC=reject.
Which means more and more things break...
I guess I will enable the From field mitigation for this list, but I will not like it. ;)
It's possible to do this only for domains that advertise p=reject. They deserve what they get.
If there are any issues that seem like they can be addressed in upstream GNU Mailman (unfortunately, we don't carry a stick big enough to convince blockheaded mail domains not to publish p=reject), let me know and I'll push it with the Mailman devs. No promises, of course.
Steve GNU Mailman