l...@ptld.com skrev den 2023-06-22 11:02:
lists.roundcube.net/kolabsys seems to be altering messages leading to
dkim=fail reason="signature verification failed" reason="fail (body
has
been altered)" and a flood of failure reports showing where are the
messages from kolabsys.com forwarded to, quarantined or rejected.
Would it be possible for lists.roundcube.net/kolabsys not to break
dkim signatures?
I doubt they will stop appending the mailing list footer to each
message which is causing the DKIM failure.
You might have better luck adding their server to a DMARC whitelist.
add it to postfix smtpd_milter_maps so kolabsys.com ips is skipped
milters, thats what recipients can do to stop the problem
i use amavisd-milter so it works, or simply in amavisd do policy banks
for breaking maillists :/
but aslong kolabsys have no control over there own server do double dkim
sign, or even full control of where to dkim sign it will for ever be
long standing problem :/
real fix is amavisd support for ARC in Mail::DKIM, this just have to be
done on all incomming mails, before mailman breaks dkim !
hard to solve :)
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