Jaroslaw Rafa via Postfix-users:
> Dnia 21.05.2024 o godz. 16:38:21 Wietse Venema via Postfix-users pisze:
> > > delays=0.01/2639/25/0.41
> > > delays=0.01/2639/25/0.58
> > > delays=0.01/2641/25/0.58
> > > delays=0.01/2644/25/0.69
> > > delays=0.01/2643/25/0.58
> > > delays=0.01/2640/25/0.57
> [...]
> > c=25s. It takes a whopping 25 econds for connection setup, including DNS,
> > EHLO, and STARTTLS. And if that is not bad enough already,
> > your connectuions also are not reysed. Reusing a connection would
> > reduce the 25s dramatically.
>
> I wonder why it is *always* 25 seconds, while the other delays slightly
> vary, which would be normally expected. Is it possible that something in
> your sending pipeline is introducing an artificial delay when setting up the
> connection, for example something tries (unsuccessfully) to connect to
> somewhere and only *after* the attempt times out, Postfix continues with
> connection setup? If timeout in question is 25 seconds, this would explain
> why the value is so constant here...
DNS queries time out after 5s, so that could be a reason, oo (bad
server(s) in /etc/resolv.conf).
Wietse
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