[Mailman-Users] dmarc_moderation_action not working in 2.1.18

Mark Sapiro mark at msapiro.net
Sat Jun 14 06:02:59 CEST 2014

On 06/13/2014 08:07 PM, glen martin wrote:
> I'm having a similar problem, also using 2.1.18-1. Posts from a Yahoo
> user are bouncing on redelivery to him.
>    Jun 13 18:55:00 host postfix/smtp[15681]: 912BD520AB:
>    to=<user at yahoo.com>, relay=mta5.am0.yahoodns.net[]:25,
>    delay=1.2, delays=0.05/0/0.25/0.92, dsn=5.7.9, status=bounced (host
>    mta5.am0.yahoodns.net[] said: 554 5.7.9 Message not
>    accepted for policy reasons.  See
>    http://postmaster.yahoo.com/errors/postmaster-28.html (in reply to
>    end of DATA command))
> General Options
>    from_is_list is Munge From
>    anonymous_list is No
> Privacy Options --> Sender Filters
>    dmarc_moderation_action is Munge From
>    dmarc_quarantine_moderation_action is Yes

with the above, your list should be munging the From: on all outgoing
messages because from_is_list is Munge From. The dmarc_moderation_action
of Munge From is redundant in this case. It would serve to munge the
>From only on messages originally from domains with DMARC p=reject or
quarantine if from_is_list were No.

So the first question is what does the From: look like on messages from
the list. Is it

From: Jane User <user at yahoo.com>

(which is not what it should be - something is wrong) or is it

From: Jane User via LISTNAME list <listname at mailman.host>

which is what it should be. If it is the latter, and your mailman.host
does not publish a DMARC policy, then Yahoo is not rejecting the mail
for DMARC, but for some other unknown to me reason, but Mailman is doing
what it can.

If the From: is not munged, then there is a Mailman issue we can
investigate. So which is it?

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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