I have three email address, all bellsouth.net domains. If I go to the AT&T Yahoo site I can login to all three addresses without a problem. Therefore I know I have a … (read more)
I have three email address, all bellsouth.net domains. If I go to the AT&T Yahoo site I can login to all three addresses without a problem. Therefore I know I have a good password and the accounts are not locked.
Last fall I lost access to all three email accounts via Thunderbird. AT&T support told me I had to establish a secure 16 character password and convert to from POP3 to IMAP servers (this proved untrue as POP3 still works). After much effort I converted all three addresses to IMAP and regained access. A few months ago one of the three address suddenly would not login via Thunderbird. AT&T technical support proved no help resolving this problem even after hours of telephone time. I can still reliably log into this account via AT&Ts Yahoo site but not via an email client like Thunderbird or OE Express. On both clients I tried both POP3 and IMAP logins, and although both work for the other two accounts, nothing works for the one problem account. Thunderbird gives the following message when I try to log in "Login to server imap.mail.att.net with username firstname.lastname@example.org failed.". I used both the original password that works with Yahoo and the 16 character secure password, with the same result. I also checked the settings multiple times.
I tried everything I can think of without success. Any suggestions would be appreciated.