Hi Skip, Could you explain your solution a bit more. It seems that I have the same problem. I recieve the message (Recieving 1 out of 4 messages) and then a time out (POP3 server not responding) when I use the FIREWALL Client with Outlook Express and ISP postbox (ag. Hotmail). What have you specified in the POP3/SMTP server address and for account? I do also have an Exchange 5.5 servre behind the ISA. Mik Pedersen EDBTeam ApS Denmark -----Oprindelig meddelelse----- Fra: skip [mailto:skip@xxxxxxxxxxxxxxxxx] Sendt: 4. januar 2002 22:34 Til: [ISAserver.org Discussion List] Emne: [isalist] pop3 access doesnt work http://www.ISAserver.org 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? ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: mik@xxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')