Port 110 not connecting

[System]
RedHat 9.0
XMail 1.20 (Newest Version)

[Problems]
-Unable to connect to port 110 from outside the server

[Details]
I am able to telnet to port 110 from inside the server, but from outside the server port 110 timesout and i am unable to connect. I do not have a firewall on port 110.

[Questions]
1) Could there be a software conflict? Are there any programs installed on port 110 by default with RH9 that i dont know about?
2) Is this an XMail configuration problem?

No - only one program can listen on a port at any one time. Any subsequent attempts to listen on the same port will fail.

Run

on your machine to show what process is listening on port 110.

Possible, but unlikely. Since you can connect locally but not remotely, I suspect that either the POP3 server is not listening for remote connections (unlikely, as this kind of defeats the point of a POP3 server), or some kind of firewalling is going on that you're not aware of. Post the IP address of this machine, and I can verify whether or not this is the case.

Ahh, i did not know what was running on my own machine. the program "iptables" was running and it had port 110 blocked, so i could only access port 110 from inside the machine. Now everything is working like a charm :-D. For all of you out there that think you dont have a firewall, you may have one that is hidden from you !!