On 7/16/23 12:41 AM, Matija Nalis wrote:
So, it fails SPF, but DKIM passes. Meaning, your mail would pass
normally modern servers which check both.
That is predicated on the receiving server(s) not rejecting the message
for SPF failure.
You probably might want to use some nice frontend to visualizing
DMARC results, if reading XML and SPF/DKIM/DMARC protocol internals
is not second nature for you. e.g.
https://github.com/topics/dmarc-reports
Thank you for sharing the pointer to that front end.
If mailing list is employing SRS, mail reaching final recipients
would not be failing SPF checkes, as envelope sender (i.e. SMTP's
"MAIL FROM: <xxxx>") would be rewritten as the mail is coming from
mailing list domain and their servers (as it would), not yours.
See https://en.wikipedia.org/wiki/Sender_Rewriting_Scheme
+1 for SRS (like behavior)
Only if the mailing list remailing server leaves original (your)
envelope sender (which it shouldn't be doing, yet often does), would
you get such SPF problems. So, SPF problem is solvable from mailing
list server side, if its admins are willing.
I've found that many, if not most, but definitely not all, mailing list
administrators are willing to make changes if they are aware of the
problem, know how to make the change, and have access to make said change.
Sadly, there are a few mailing lists that I'm on that are quite aware of
the problem but have decided to refuse to make the change and are in my
opinion acting like ostriches and sticking their head in the sand.
Also, if your mails are signed by DKIM, and mailing list software is
not rewriting signed headers nor body (as it shouldn't, but some
mailing lists try to add annoying text to the bottom of messages
like "to unsubscribe, do xyz", thus breaking both DKIM, S/MIME and
PGP signatures), then your mail should pass DKIM checks too. So that
problem is avoidable on mailing list server side too.
Yep. Mailing lists and other similar forwarding services are the places
that have the most influence of if things work well or not for the most
people.
Should each and every sending subscriber make changes to their
independent systems? Or should the singular mailing list make changes
in one place and help everybody?
Simple energy conservation seems to indicate changes in fewest places is
better.
Grant. . . .
