I have an incoming e-mail on pop. This is pop.netzero.com. This works fine. Outgoing SMTP is mail.optonline.net On all my other computers, mail.optonline.net goes through 25 as a port with no authentication and no password required. I have tried a number of iterations of changing the port (25, 465, 587), the password, the security settings, etc., but nothing seems to work. I have deleted and reloaded Thunderbird into Norton and allowed access to same. Any ideas? Thx. H. Coleman