I've just installed ISA 2000 on Server 2003 and everything web wise is working hunkydorey, but the emails from Exchange are being blocked by ISA server now. I have opened all protocols and ports (i think) and the logs are still reporting them as blocked?!?!
The setup is 2 nics in the server
internal nic: 192.168.16.1
external nic: 192.168.0.1
date time source-ip destination-ip protocol param#1 param#2 filter-rule interface
2006-05-03 10:15:36 192.168.0.1 x.x.x.x Tcp 11291 25 BLOCKED 192.168.0.1
2006-05-03 10:15:42 192.168.0.1 x.x.x.x Tcp 11291 25 BLOCKED 192.168.0.1
Any help would be apreciated.