Gmail's POP port is 995 SMTP is 465 and both ports use Secure connection
Under server Settings check the "Use secure connection (SSL)" option
and you also have to enable POP from the web-interface, http://gmail.google.com/support/bin/answer.py?answer=13273
Read here further : http://mail.google.com/support/bin/answer.py?answer=13285&topic=1556
revant