text: Your ISP may be blocking the port you are trying to use for SMTP.\n\nIf you are using port 25, gmail recommends trying a different port number.  See:\nhttp://mail.google.com/support/bin/answer.py?answer=13292&topic=1555\n\nIf you have already tried the recommendations from that site, the alternate technique is just to use the SMTP setup defined by your ISP.  If you do not understand how to do this, either gmail help or your ISP help should be able to advise you.