[clug-talk] Semi-OT: Server and/or Client Anti-Spam Solution

[TekBudda]

I figured the list has been a bit quiet lately so I thought I would stir 
up some conversation, debate & maybe a bit of controversy. ;-)

I know this will raise some hackles but this is a Windows Server 2003 
(Small Business) running Exchange 2003 and the clients are Outlook 2003. 
  I would like to find some that is cross-platform and open-source as 
there is potential to move a Linux box or possible virtualized box into 
the network in the future.  We host the server there and our DNS records 
are hosted eleswhere, so people are essentially e-mailing us directly.

What I envision is something that traps the spam as it is coming into 
the server and preferably moves it into a "Review" folder to make sure 
we don't lose any ham.  I would like something that is trainable and 
possibly relies on multiple lists or multiple ways to classify and deal 
with the spam.  The filtering system in exchange is ok but like 
everything else MS it is limited adn doesn't quite cut the mustard. 
Also...I do have a couple mailboxes that are still active but are not 
checked on the client side at this moment so no client-side flitering is 
done on them.  This means that they seem to attract more spam.

A couple of products I have looked at are ASSP, SpamBayes and a couple 
other ones whose names escape me at the moment.  From the looks of it 
the 2 above are POP3 proxies that seem to do what I want.  I was also 
thinking of using a client solutions like SpamPal in conjunction with 
one of these on the client that might be able to catch stuff that was 
missed.

Is ther anyone who has experience with these or other solutions that 
anyone could suggest?  The AV solution we use is TrendMicro SMB product 
so if something integrates with that...even better.

If people would prefer to contact me off-list that is fine.