I have some people in my network that use OE to send and recieve emails, and connect to news groups. If my clients are setup as SNAT they can send and recieve no problems. When the client is setup as firewall they cant. In my protcal definitons i have pop2 pop3 pop3 server pop3s and pop3s server all checked. I also have Exchange5.5 behind my ISA server and this is working fine for both pop3 and smtp. What could be the problem with the firewall client not being able to send and receive pop3 email?