> How do you limit it to just addresses with DMARC problems?  There's no
> benefit to doing it to everyone.

Probably a hard-coded regexp (or list thereof) matching against the
address in "From".  The OP has a special situation where he's got lots
of local mods to Mailman, so it's not convenient to upgrade.  So he
wants a quick and dirty approach, and he also knows enough Python that
he can work out the details for himself.

Isn't there code in 2.18 to check for DMARC problems to catch messages on the way in? I'd think you could adapt that.

Regards,
John Levine, jo...@taugh.com, Taughannock Networks, Trumansburg NY
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