> On Mar 9, 2018, at 7:23 AM, Nikolai Dahlem <f-post...@dahlem-marten.de> wrote:
> I run a local instance of unbound for dns caching


> Below is postconf -n output:
> milter_default_action = accept
> milter_protocol = 6
> non_smtpd_milters = $smtpd_milters
> smtpd_milters = inet:

Everything else looks rather vanilla, so the next thing to look for is latency
in the milter.  What does this milter do?

Also check your syslog configuration, make sure it is not syncing the log file
to disk on every write.


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