imf and other smtp blocking recommendations

  • From: "Harondel J. Sibble" <exchangelist@xxxxxxxxx>
  • To: "[ExchangeList]" <exchangelist@xxxxxxxxxxxxx>
  • Date: Tue, 20 Dec 2005 18:07:24 -0800

Okay, running Exchange 2003 enterprise with SP2. After installing I started 
looking around for documentation on IMF and most that I found was about IMF 
ver 1.  I've also been paying attention to comments on this list and others 
about IMF in general.

I have some simple things that I want to do

1) block certain domains (blacklist) at the smtp session level so I don't 
have to deal with their crap
2) block certain accounts at the smtp session level that used to exist on the 
exchange server. We have several accounts like contact@xxxxxxxxxx and 
subscribers@xxxxxxxxxx, that we dumped as they were get 99% spam and 1% real 
3) some general blocking at the smtp session level using RBL's and the like 
to reduce the amount of spam and viruses that our Trend Client Server 
Security Messaging Suite (ver 3.0) needs to deal with.
4) whitelist specific emails and domains, particularly mailing lists used by 
the staff, I see from Carl Houseman's comments, this might not be possible in 
IMF 2.0

The firewall is the fortigate FG60 which also has the capability to block 
incoming smtp traffic, however, it's antispam solution is not granular enough 
for my tastes.

So is IMF the tool for me, or are there other free or cheap solutions to do 
the trick at the smtp session level?

Harondel J. Sibble 
Sibble Computer Consulting
Creating solutions for the small business and home computer user.
help@xxxxxxxxx (use pgp keyid 0x3AD5C11D)
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