On Tue, Nov 19, 2019 at 11:10:38AM -0800, Jeremiah Rothschild wrote:
> Running postfix-2.10.1-7.0.1 on a fully updated CentOS 7.7 box. Postfix is
> configured with an OpenDKIM milter like so, which works fine under normal
> circumstances:
>
> smtpd_milters = inet:127.0.0.1:8891
> non_smtpd_milters = $smtpd_milters
> milter_default_action = accept
The documentation says:
milter_default_action (default: tempfail)
The default action when a Milter (mail filter) application is
unavailable or mis-configured.
and so not when the milter is "working", but returning 4XX
verdicts (are those a problem with the milter, or the milter
e.g. graylisting messages, ...?).
> However, when file permissions on the OpenDKIM key pair are wrong, resulting
> in a failed signing, this happens and the message goes back into the queue:
>
> Nov 14 00:00:27 food opendkim[2135]: can't load key from
> /etc/opendkim/keys/private: Permission denied
> Nov 14 00:00:28 food postfix/cleanup[26603]: 4C9D13000A1: milter-reject:
> END-OF-MESSAGE from localhost[127.0.0.1]: 4.7.1 Service unavailable - try
> again later; from=<[email protected]> to=<[email protected]>
>
> This looks like a "tempfail" action to me. Why isn't "accept" being honored?
It seems the tempfail is from the milter, not from Postfix. Postfix
is not in a position to know that the milter is not working as it
should, the milter is responding "normally".
--
Viktor.
