We've run into a problem with a MILTER, which Postfix is supposed to ignore in
case of problems. To do so we've configured Postfix to use
milter_default_action = accept, when it communicates with the milter, like
this:
mymilter = {
inet:127.0.0.1:6677,
connect_timeout=10s,
default_action=accept
}
smtpd_milters =
$mymilter
...
However it doesn't work and I'm trying to understand why. What kind of
reply/return code does Postfix (or libmilter) need from the milter to let it
'accept' the message in question?
A little background:
The real culprit here is some crappy mail marketing software, which creates
non RFC-conform headers containing Umlauts like this:
Date: Sat, 4 Jan 2020 09:53:42 +0100 (Mitteleuropäische Zeit)
This causes problems in the MILTER application/library. Unfortunately we are
not in a position to tell that particular customer to use something else at
the moment. So I'd like to let Postfix accept messages when the milter runs
into problems.
TIA,
p@rick
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