Firewall Wizards: Re: FWTK and smap/smapd

[Brian Hatch <firewall-wizards () ifokr org>]

> > Much of the spam I used to receive came from forged hotmail.com accounts.
> > Very little spam actually comes from hotmail, so I don't want to just block
> > them since there are some legitimate correspondents of mine that use their
> > mail (heck, I use a hotmail address sometimes when I'm on the road..)
> Ron Guilmette has patches that do this for Postfix at
> <http://www.monkeys.com/anti-spam/filtering/additions.html>.  I
> tried them but had too many false positives, even for the commonly
> forged domains like hotmail.  They did catch some spam though it
> never more than 2 or 3% of the daily filtered total.
SpamAssassin (which is usually called from your delivery agent,
not your MTA) does catch these forgeries with very good accuracy.
You might want to give it a try.  



--
Brian Hatch                  If you think there
   Systems and                there is good in
   Security Engineer          everyone, you
www.hackinglinuxexposed.com   haven't met everyone.

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