Description

You might be experiencing difficulties with setting up the AT&T email account through Outlook due to configuration and security problems. To begin, launch Outlook and go to the “File” tab, selecting the “Add Account” option. Type in your AT&T email address and then click on “Manual Setup.” Click the “IMAP” option so that changes on any device are reflected on the rest.

a) For the incoming mail server type in the details as follows: imap.mail.att.net Port 993 and enable SSL encryption.
b) For the outgoing mail server (SMTP), enter the details of smtp.mail.att.net Port 465 and enable SSL.
c) Your username should be your complete email address AT&T email account and you should make sure to enter the correct password. If Outlook does not connect to the server, you may also try creating the secure mail key from your account settings as that is required by AT&T in order for Microsoft Outlook to connect with their servers.

Please sign in to your AT&T account, select “Profile,” and then “Sign-in Info” as the option. It is possible to generate a secure mail key that can be used in place of the normal password people use every day. Replace your Outlook password with the secure key and that should solve most issues related to connection. If this does not work, one can always try to reach them through reliable channels for AT&T support and that should help you solve the matter.

More Info: https://www.resetattpassword.com/blog/steps-to-setup-att-email-account-in-outlook/