Rejected messages from the mailing list

From: SM <sm_at_resistor.net>
Date: Mon, 02 Aug 2010 03:29:22 -0700

Hello,

One of the subscribers to this mailing list is rejecting messages
from the list. The remote MTA returns a "550 DKIM signature required
by policy" reply. The rejection is triggered when the domain used by
the poster has a "dkim=all" ADSP policy. This mailing list adds a
DKIM signature to the message but it does not alter the message or
remove the existing DKIM signature.

It seems that the DKIM verifier is only checking the top-most DKIM
signature instead of all the DKIM signatures. That would explain the
policy rejection.

As this mailing list is about discussing about OpenDKIM and also
debugging it, it would be helpful if you do not apply ADSP policy for
mail traffic from this mailing list.

Regards,
-sm
Received on Mon Aug 02 2010 - 10:29:56 PST