The following are the ATT email settings for IMAP that you must use in order to use the incoming email services without any issues: -
Account Type:- IMAP .
Enter your ATT email address as your username.
Enter the username's password.
Incoming server hostname:- imap.mail.att.
Port number:- 993.
Enter your user name and password for authentication.
For SSL/TLS, type yes.
After applying the above given steps for att.net email IMAP settings, you will be able to enjoy the att incoming mail services.
See Also this post:- https://www.datarecovo.com/fix-att-email-not-working-problem/
Enter the following:
Incoming (IMAP) server: imap.mail.com
Port (Incoming server): 993
Incoming server requires SSL: Yes (check box)
Outgoing (SMTP) server: smtp.mail.com
Port (outgoing server): 587
Outgoing Server requires SSL: No (uncheck)
Regards,
Bruce