Pascal,
> >For some reason Postfix (or firewall) on 10.0.0.2
port 10026 is
> >rejecting TCP connections. Try 'telnet 10.0.0.2
10026' from 10.0.0.3
> >and see what Postfix writes in its log.
>
> When telnetting it takes a while for the socket to
connect, and then I get
> after maybe 12-15 secs,
> "Connected to 10.0.0.2. Escape character is
'^]'."
> And 5-10 seconds after that, I get the ESMTP banner...
...
> I don't know what happens... would it be the time it
takes for connecting?
Yes, if it takes longer than 30 seconds for MTA to respond
with
a greeting to a connect from amavisd, then amavisd gives up
and logs a 'Negative greeting: '.
Timeouts are hard-wired for the moment in amavisd:
my($smtp_connect_timeout) = 30;
my($smtp_helo_timeout) = 300;
my($smtp_xforward_timeout) = 300;
my($smtp_mail_timeout) = 300;
my($smtp_rcpt_timeout) = 300;
my($smtp_data_init_timeout) = 120;
my($smtp_data_xfer_timeout) = 180;
my($smtp_data_done_timeout) = 600;
my($smtp_quit_timeout) = 10; # 300
my($smtp_rset_timeout) = 20;
Rather than fiddle with amavisd, it would be better to find
out why Postfix is so terribly slow to respond.
It could be a DNS issue, Postfix tries to do a reverse DNS
lookup
for 10.0.0.3, and it seems it does not get an answer.
Fix your internal DNS resolving for starters (or disable
DNS check in Postfix on a re-entry port, as a desperate
measure).
Mark
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