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 messages 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) http://www.pdscc.com (604) 739-3709 (voice/fax) (604) 686-2253 (pager)