[opendmarc-users] opendmarc and Mailer Daemon

[Дилян Палаузов]

Hello,

sendmail does not DKIM-sign bounces.  In such cases SPF shall help,
unless the bounces are “indirect mail flow”.

You can change the source code of opendmarc to accept those email,
despite not strictly conforming to the DMARC principles and the desire
of the domain owner.

Greetings
  Дилян

On Mon, 2021-09-06 at 14:18 +0200, kzkz at poczta.onet.pl wrote:
> Hi,
> 
> I have installed and configured opendmarc on the receiving SMTP
> server.
> 
> I have noticed behavior such as the following: when the message is
> from Mailer Daemon - when 'MAIL From: <>' is used during the SMTP
> dialog, and the From: header line is a valid sender's domain,
> opendmarc marks such messages as 'dmarc=fail'. Consequently, when the
> sender's domain DNS _dmarc record contains p=quarantine/reject, the
> mail will not reach the recipient mailbox.
> 
> Does running opendmarc on the receiving server prevent receiving
> messages from Mailer-Daemon?
> What should I do to get my users to receive such messages?
> 
> Kazik
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