The server hostname is “imap.mail.att.net” 
   The port number is 993
   Select the security SSL/TLS
   Choose autodetect in Authentication

   The server hostname is “outbound.att.net”
   The port number is 465
   Select the security SSL/TLS
   Choose “normal password” in Authentication
   Enter your email address as both incoming and outgoing username.
   The connection security should be marked as “Yes” for both the inbound and the outbound setting.

I want to move from webmail with Sbcglobal to Thunderbirdmail client. I would like to use IMAP so the mail stays on the server. I have tried to set up my account on Thunderbird using the following. To set up the incoming email server: The server hostname is “imap.mail.att.net” The port number is 993 Select the security SSL/TLS Choose autodetect in Authentication To set up the outgoing email server: The server hostname is “outbound.att.net” The port number is 465 Select the security SSL/TLS Choose “normal password” in Authentication Enter your email address as both incoming and outgoing username. The connection security should be marked as “Yes” for both the inbound and the outbound setting. I get the message: The Following settings were found by probing the given server. Then I click Test. Then I get a yellow error at the top that says: Unable to login at server. Probably the wrong configuration, username or password. I have checked and everything looks correct. Any help or ideas appreciated.