GMAIL OUTBOX WONT SEND

This is the message I receive when trying to use my gmail accounts:

"Cannot send message using the server smtp.gmail:myaddress@gmail.com
Connections to the server “smtp.gmail.com” on the default ports timed out.

Select a different outgoing mail server from the list below or click Try Later to leave the message in your Outbox until it can be sent."

 

I've run connection tests over POP/IMAP ports and everything is working.

However the Norton Firewall freezes every time I try to access outgoing connection info and I have to perform a Force Quit. I believe the firewall is blocking the POP3 connection but don't know how to circumnavigate it.


Any help would be most appreciated.

Mac OS 10.6.1
Apple Mail v 4.1
Norton 2007 v 11.0.3