I'm hvaing trouble receiving POP e-mail from an ISP from behind a PIX 506 firewall. Attempts to telnet to port 110 from behind the firewall fail, however, from outside the pix the connection is fine, so I know it is something in the firewall configuration.
I have the following access-list applied on the outside interface in.
access-list rdpin permit tcp any interface outside eq 3389
access-list rdpin permit tcp host [ISP Mail Server] gt 1024 any
Initially, the access-list was for the RDP only, however I thought opening the ports above 1024 was the problem with POP. With no access-list it still does not work and opening pop3 port does not work either. What needs to be open for POP to function on the internal network?