From: Ralf Hildebrandt (Ralf.Hildebrandtcharite.de)
Date: Sun Jul 02 2006 - 03:03:53 CDT

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* Jan Steinman <JanBytesmiths.com>:

> But sending from other machines on our network takes increasingly long
> times after starting the server. It has been three days since a
> restart, and it now takes about 20 seconds pause between hitting
> "send" and having the message leave the queue.
>
> There are over a hundred process entries like the following:
> postfix 2272 0.0 -0.0 27524 924 ?? S 4:33PM 0:00.03 smtpd -n smtp -t inet -u

So your box has a lot of incoming connections. How many smtpd processes
are configured (check master.cf to see)?

> Checking logs, I am getting 10-20 rejects PER MINUTE! All of them
> appear to be legit rejects -- generally "User unknown in local
> recipient table".

OK, that's not much. What is smtpd_error_sleep_time set to?
% postconf smtpd_error_sleep_time
tells you.

> I suspect that spammers are hitting me particularly hard
Hard? 10-20 rejects per minute is not a lot.

> 5) Throttle the number of smtpd process instances: CONS: may increase
> Inadvertent Denial of Service to legit SMTP traffic.

Indeed. So why not up it?

Show postconf -n :)

--
Ralf Hildebrandt (Ralf.Hildebrandtcharite.de) spamtrapcharite.de
Postfix - Einrichtung, Betrieb und Wartung Tel. +49 (0)30-450 570-155
http://www.postfix-buch.com
Why you can't find your system administrators:
They are hiding under the stairs

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