I have an AT&T account and for some reason or another, Thunderbird isn't recognizing the user-name and/or password and according to AT&T' s own website, their POP3 settings are: Account Type - Select IMAP or POP3. • Incoming mail server - Enter imap.mail.att.net (IMAP) or inbound.att.net (POP3). • Outgoing mail server - Enter smtp.mail.att.net (IMAP) or outbound.att.net (POP3) Incoming server - Enter 993 (IMAP) or 995 (POP3). • Use the following type of encrypted connection - Choose SSL. • Outgoing server - Enter 465 (IMAP and POP3). • Use the following type of encrypted connection - Choose SSL. And all true settings were true, but Thunderbird isn't ( wasn't ) recognizing the settings...