[NTLUG:Discuss] Postfix Spam Blocking

[Greg Edwards]

Victor Brilon wrote:
> 
> There's a *HUGE* part of your problem. SA 3.x is much more clever about 
> the new types of spam that are out there. You should really consider 
> upgrading if you're able to.
> 

I've noticed with SA, and I read this as a general rule of thumb, you need 
to update often.  When a new spam filter version is released the spam 
mongers start working on tricks to get around them.  You may get 99% with 
the new release but it starts losing its effectiveness immediately.  My 
current SA isn't even getting 60% anymore, but when I upgrade I expect to 
be back to 98% or better.

As far as stopping traffic from getting to your server goes (the original 
question as posted), sorry, but it's going to affect you.  Somewhere in 
the route the mail has to be evaluated, either by a firewall (ip 
blocking), spam filter, mailserver, or MTA.  The traffic will still be on 
the network and if your ISP doesn't filter it for you it'll be on your 
network somewhere.

-- 
Greg Edwards
New Age Software, Inc.
Custom software for an off the rack world
http://consult.nas-inet.com