Jayson Smith writes:
> Good point about DMARC. Does anyone know if Charter suddenly started
> caring about some DMARC policies on or around this past Friday?
I for one don't know. You'd have to ask their postmaster, or get the
subscriber to do so, to be sure. I think it's as likely that they got
an update to their filters from a vendor. That could be sensitive to
DMARC from alignment, or it could be something else.
> I have my list set to munge the From: lines of messages from
> senders E.G. AOL, Yahoo, etc. that publish a DMARC rejection
> policy.
You could try setting up your list mail to participate in the ARC
protocol.[1] I think most MTAs have options or plugins for this by
now. Also Mailman 3 has an option to handle it itself, but it is
preferable for the MTA to handle it as Mailman 3 can't validate SPF.
> On a slightly different topic, I've heard from a few Outlook users
> that list messages are consistently ending up in their junkmail
> folders.
All of the big providers have this problem occasionally, although my
impression that it's more of a problem with Microsoft than Google or
Yahoo!. Again, ARC might help.
Footnotes:
[1] Authenticated Received Chain,
https://datatracker.ietf.org/doc/html/rfc8617
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