Set up or update AT&T email for Microsoft Outlook 2016

Learn how to set up your AT&T Mail, update settings, and add your secure mail key for Microsoft Outlook 2016.

Get a secure mail key

A security upgrade is coming to AT&T Mail. If you use Outlook for email, you’ll have to update your email settings. Learn more about the security upgrade.

Be sure to create a secure mail key to set up or update AT&T Mail in Outlook 2016.

Set up Outlook 2016 for AT&T Mail

Set up your email for the first time or set it up on a new computer.
  1. Open Outlook, select File, then Add Account.
  2. Choose Manual setup or additional server types.
  3. Select POP or IMAP.
  4. Fill in your user details.
    • Enter your name as you want it to display to others.
    • Enter your full AT&T mail address.
  5. Enter the server information.
    • Account Type - Select IMAP or POP3.
    • Incoming mail server - Enter (IMAP) or (POP3).
    • Outgoing mail server - Enter (IMAP) or (POP3).
  6. Fill out the logon information:
    • User Name - Enter your full email address.
    • Password - Enter or paste your secure mail key.
    • Check Remember password and Require logon using Secure Password Authentication.
  7. Select More Settings.
  8. Complete Outgoing Server info.
    • Check My outgoing server (SMTP) requires authentication.
    • Select Use same settings as my incoming mail server.
  9. Complete Advanced info.
    • 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.
  10. Select OK and then Next. Outlook will test your account info. If everything passes, select Finish.

Verify or update AT&T Mail settings

Already have your email set up, but want to update your email account with your secure mail key? It's a simple process.
  1. Select File, then Account Settings.
  2. Choose your AT&T email account and then select Change
  3. Confirm or enter the IMAP or POP settings.
    • Incoming server: (IMAP) or (POP3) 
    • Outgoing mail server: (IMAP) or (POP3)
  4. Check or enter your User Name (full AT&T Mail address).
  5. Enter your secure mail key in the password field and select the Remember password checkbox. 
  6. Select Next. Outlook will test your account settings. 
  7. Select Close, then Finish.
Last updated: August 3, 2023

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