Re: per sender/email exclusion for smtpd_milter_maps, or equiv?
> I'd like to all dkim interaction/processing for a single internal sender ([hidden email]); ideally excluding it from pass to outbound milter at all.
It is not possible to switch Milter options in the middle of an
SMTP session. That is why smtpd_milter_maps is indexed by the SMTP
client IP address, and not by information that is received during
an SMTP session. In theory software can be made to do arbitrary
things, but in practice one has to limit the code complexity to
guarantee some level of bug-free-ness.
Maybe you can configure an exception for the sender's domain in
the dkim milter configuration.