Outlook and Firewall / Proxy

[Guest]

I have cable internet and I am running ISA 2004 as a router and firewall. All
systems behind the firewall can browse the intenet freely via a proxy
configuration. Outlook Express 6 is able to connect and get all messages via
POP3 from mail.adelphia.net. However Outlook 2003 is not. It cannot send or
receive mail at all even though it's using the exact same e-mail account
configuration.

I have looked every where for a proxy configuration, but no success.

How do I solve this issue?

 

[Guest]

I solved this problem last night!
I found the problem was ISA and its Firewall Client which blocked all
traffic from Outlook. The solution to this problem can be found here:
http://www.isaserver.org/articles/2004olpop3smtp.html
For anyone facing the same issue!