I am trying to allow a few outside users to connect via POP3 to our exchange server. They are connecting with Outlook 2003. It works from inside the firewall so I am pretty sure that it's a firewall issue. From outside of the firewall I can telnet via port 110 and log into the server. So it would seem like Outlook should be able to do the same. However, when we set up a POP3 account in Outlook it can not log into the server i.e. test account and the Unable to log onto POP3 server and no test message sent message comes up. Let me know if there is another port that should be opened up or if there are any other possible causes. Thanks
Answered in .admin. Try not to multipost questions.
