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Date: Wed, 26 Mar 2003 10:38:57 -0500
From: Jason Hunt <leth@primus.ca>
To: Wayne Swart <fixx@fixx.co.za>
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cc: FreeBSD Mailing list <freebsd-questions@freebsd.org>
Subject: Re: Content Filtering on Exim
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On Wed, Mar 26, 2003 at 01:54:19PM +0200, Wayne Swart wrote:
> 
> Does anyone know of a content filtering app that can check the body, and
> headers of emails for certain keywords and stuff, and then decide weather
> the mail should be delivered or not?
> 

Check out procmail (http://www.procmail.org/)

Hope this helps.