[Mimedefang] Lower spamassassin scores on newer faster server

Kenneth Irving ken at fq.edu.uy
Thu Nov 23 08:12:58 EST 2006


The first thing you have to ask yourself is wether more spam is
effectively passing through or not. 65% or 50% of email marked as spam has
no meaning by itself. You cannot compare these numbers, unless you are
making a test, using a selection of emails you previously knew were spam
and ham.

Obviously the antivirus software has nothing to do with spam. If there is
a difference, that must be found in the configuration of the installed
software.

Best regards
		Kenneth

On Thu, 23 Nov 2006, Delahunty, Mark wrote:

> Hi,
>
> I have a server running mimedefang with spamasassin + fsav + sophos (no
> sophie). It marks 65% of our incoming emails as spam.
>
> I've set up another server with the same hardware, operating system and
> mimedefang configuration except for 2 changes:
>
> 1. It uses clamd instead of sophos
> 2. It does no streaming
>
> The new setup is much faster to process messages. I think this is because
> sophos (without sophie) uses _lots_ of CPU. The trouble is, the new setup
> marks less than 50% of our incoming emails as spam.
>
> Anyone got any ideas why?
>
> Is it possible that the older server was avoiding spam because it was
> deferring incoming mails and the spammers do not retry deliveries?
>
> I'd be grateful for any suggestions anyone might have.
>
> Mark Delahunty
> Computer Centre
> University College Cork
> Ireland
>
>
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