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1 Message

Wed, Apr 21, 2021 2:25 AM

unable to sign into email app on my phone or my desktop

About a week or so ago, the app on my desktop signed me out of my AT&T email and said I needed to sign in again.  I have tried signing in, but it tells me unknown destination after I put my password in. I thought it was the app and deleted it, using the web instead.  Now, I am getting the same problem with my phone.  I had to sign back into the app using my user name and password, I hit enter and received the message, unknown error.  I have deleted my cache and cookies and still received this message.  PLEASE tell me how to resolve this issue as I would like to continue receiving notifications when I receive emails on my desktop and my cell phone.  By the way, I have a Samsung Galaxy Note 20 and I am using Windows 10 on my HP desktop.


Community Support


176.3K Messages

7 m ago

We'll gladly assist you with your email, @Tomicoy!


What mail client and app are you using (Outlook, Windows Live Mail, Yahoo, etc.)?


Have you tried troubleshooting with our Login and Email Solutions article?


If not, try these steps and let us know how it went:


  • Test using webmail - If you are able to sign in to your email via the web, the issue points to the app or mailbox you are using.

  • Mailboxes - we recommend using the latest version. Updates and changes may prevent it from working properly. 

  • Rebuild Mailbox profile - In some instances, rebuilding the profile fixes some issues. You may lose email doing this

  • Change your settings from POP to IMAP.

  • Test using webmail. If do not experience issues, it could be related to the 3rd party app

  • Client issues - If you are using POP, you must now use IMAP. There was a recent change, which this article will further explains.

AT&T does not officially support or troubleshoot mailboxes/ clients like Outlook.


We hope this helps! If you need further assistance, let us know.


Aminah, AT&T Community Specialist


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