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Re: Postfix + amavisd-new + dspam + imap - performance question
From: /dev/rob0 (rob0
gmx.co.uk)
Date: Mon Nov 13 2006 - 22:43:11 CST
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On Monday 13 November 2006 20:56, JackHammer19 wrote:
> I have a mailserver configured with Postfix and using amavisd-new
> with F-Prot for virus filtering and dspam 3.6.8 for spam. Mail
> delivery is through Dovecot IMAP. The system does not support POP.
snip
> or is there any way I can tune the system to improve performance?
You didn't mention any SMTP-time UBE controls. This might help:
http://jimsun.linxnet.com/misc/postfix-anti-UCE.txt
The load you describe would not be much for a server which disposed of
the "easy ones" before resorting to content filtering. Zen.spamhaus.org
and the check_helo_access described will make a huge difference, more
safely than most content filters can manage.
Greylisting has an impact on your users (they won't get automated
emails as quickly as they might expect) but at present it's fairly
effective against zombie and viral spam.
As you have correctly identified, the real load comes from the content
filter. By reducing that load your server will do fine.
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