Sync old email IMAP

Hi @nblake5! We completely understand your concern regarding syncing old email IMAP, and would like to help. Let's get the assistance you require.

In order to fix this, we'd recommend you to follow this below-mentioned steps.

Secure mail keys, email program setup, or updates

Get a secure mail key

A security upgrade is coming to AT&T email. If you use Apple Mail or Mac Mail with macOS 10.10/Yosemite or older, you’ll have to update your email settings. Learn more about the security upgrade.

If your OS is affected, be sure to create a secure mail key to set up or update your email. If your Mac runs on OS 10.11/El Capitan or above, you won’t need one.

Set up Apple Mail (OS X) for AT&T email

Use these steps to set up your email for the first time or on a new computer.

1. From Mail, select Mail > Preferences.
2. Choose Accounts and then select the + (plus sign).
3. Select Add Other Mail Account and then Continue.
4. Complete Add a Mail Account info:
   • Full name as you want it to display to others
   • AT&T email address (YourName@att.net)
   • Password – enter your password or secure mail key
5. Select Create. The account will automatically configure and appear in the Accounts list.
6. Close the Preferences window to begin using your email account.

For more information, you can also check our ⁠verify or update AT&T email settings.

Let us know if this helps.

Thank you for contacting AT&T Community Forums,

Ancy, AT&T Community Specialist.

#18181081#18181081

As I said in the post, I am on the current versions of macOS (14.4) and Apple Mail (16), so this does not seem to apply.

Please advise.

Hi @nblake5! Thank you for writing us back! We understand that on your MacOS Apple mail you are not able to completely sync email data. We hear you, and are happy to assist you.

Please re-set Apple mail for AT&T email with the below provided steps:

1. From Mail, select Mail > Preferences.
2. Choose Accounts and then select the + (plus sign).
3. Select Add Other Mail Account and then Continue.
4. Complete Add a Mail Account info:
   • Full name as you want it to appear to others
   • AT&T email address (YourName@att.net)
   • Password – enter your password or secure mail key
5. Select Create. The account will automatically configure and appear in the Accounts list.
6. Close the Accounts window to begin using your email account.

Verify or update AT&T email settings.

Already have your email set up, but want to update your settings or add your 
secure mail key? Here’s what you have to do:

1. Select Preferences > Account Information.
2. Choose your mail account.
3. Select POP3 or IMAP.
4. Confirm User name.
5. Enter your password or secure mail key.
6. Confirm or enter the following settings:
   • Incoming Mail Server - inbound.att.net (POP3) or imap.mail.att.net (IMAP) 
   • Outgoing Mail Server - outbound.att.net (POP3) or smtp.mail.att.net (IMAP) 
7. In Outgoing Mail Server (SMTP), choose Edit SMTP Server List. 
8. Confirm:
   • Server Name - outbound.att.net or smtp.mail.att.net
   • Use default ports - 25, 465.
   • Use Secure Sockets Layer (SSL) is selected
9. Select OK. 
10. On Advanced tab, confirm:
    • SSL checkbox is selected.
    • Authentication field is set for Password.

We also recommend that you trying using a different email client on your Mac. You can check the steps on our article about ⁠Set up or update AT&T email. 

Let us know how it goes!

For further assistance we're here to help you.

Thank you for contacting AT&T Community Forums,

Emma, AT&T Community Specialist.