[TriLUG] Spamassassin question - Bayesian filtering

[Jon Carnes]

Ahh, yet another reason to use OpenBSD!

I like his tarpit idea, not that I would ever do that at a corporation,
but for a personal install it would be fun!

For those who don't want to follow the link, he runs SpamAssassin (via a
procmail script) to tag messages as spam.  He then runs a program
(relaydb) that grabs the valid IP addresses from the email and puts them
in a white (non-spam) or a black (spam) database. 

If the number of spam messages from an IP exceeds the number of non-spam
by a factor of 3 then the IP is dumped in a <spammer> list and any
attempts to connect from that IP to port 25 are redirected to 8025.

Running on port 8025 is a tar-pit/smtp server which simply wastes the
connecting servers time (till it times out in 10 minutes).

<chuckle>

On Thu, 2003-03-13 at 15:08, Brandon L. Newport wrote:
> We typically use qmail in conjunction with spamassassin, but sometimes
> clients want to manage it on their desktop so I normally suggest
> http://popfile.sourceforge.net/  Now we can also utilize spam checking at
> the firewall level with OpenBSD and PF, here is some info about doing that
> http://www.benzedrine.cx/relaydb.html.
> 
> -brandon
>