Date: Wed, 25 Oct 2006 21:35:55 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Jack Stone <antennex@hotmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: Shell question Message-ID: <20061025213046.I19297@wonkity.com> In-Reply-To: <BAY106-F3222330AF276AB9714149FCC060@phx.gbl> References: <BAY106-F3222330AF276AB9714149FCC060@phx.gbl>
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On Wed, 25 Oct 2006, Jack Stone wrote: > Folks: > I have managed to piece together a shell script that is able to retrieve the > domains from the spams of the day and summarize those in a special file that > can then be added to the sendmail's rejects in the access.db. But, first I > have to eyeball the list and remove any obvious good-guy domains. > > I would like to create another list of those same good guys that can be added > to each day as they show up, then compare it to the above main list and > delete the good guy domains before adding to the access.db. Greylisting will be much more effective than this approach, and is easier to implement. Combine that with sbl-xbl and maybe a few other DNSBLs, add greet_pause of five or ten seconds, and you have much more effectiveness with less false positives and much less maintenance. Adding clamav rounds out the whole thing. I wrote an article that covers some of this: http://www.wonkity.com/~wblock/greylist.pdf -Warren Block * Rapid City, South Dakota USA
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