ATT.net new Outlook install error 554 Email Rejected

When did you create the Secure Mail Key?  We've seen numerous instances where the key suddenly just stops being accepted.  Deleting the key and creating a new one fixes the issue.

Set up Outlook manually, don't let it try and find the correct settings.  And don't use the Test Message.  I've chased down Outlook connection issues for hours until I realized that real email got sent, but not the ones from the Test button.

Use these alternate servers instead of the att.com servers.

POP3

pop.mail.yahoo.com  (use Port 995 and SSL/TLS)

smtp.mail.yahoo.com  (use Port 465 and SSL/TLS)

Hi there, Dar22. We understand that you are having a problem with setting up your Outlook with your AT&T email address, but you are getting an error 554 email rejected. Let's look at this together.

According to the error number, it looks like something in the way that set-up is configured, that the sending of the test email is being rejected. So let's look at the email client set-up. Follow these steps:

1. Open Outlook, select File, then Add Account.
2. Choose Manual setup or additional server types.
3. Select 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
   • Incoming mail server - Enter imap.mail.att.net (IMAP)
   • Outgoing mail server - Enter smtp.mail.att.net (IMAP)
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).
   • Use the following type of encrypted connection - Choose SSL.
   • Outgoing server - Enter 465 (IMAP).
   • 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.

The reason why we are going this route is, that you have stated that you are using the POP3 settings. Try the IMAP settings to see if that works better.

Please update us and let us know.

Matthew, Community Specialist

Thank you!

Under the More Settings I failed to go to the Outgoing Server Tab.

I went to the tab did the fol

Select More Settings.

Complete Outgoing Server info.

Check My outgoing server (SMTP) requires authentication.

Select Log on using

User Name:

Password: Add Secure Key Password

Select Remember Password

Select Require Secure Password Authentication

Skipped Use same settings as my incoming mail server. 

I skipped since I was able to read a different post on a Microsoft site and keyed in on the Outgoing Server Tab.

Does it Make any difference? I am happy I got it set up.

Thanks for coming back, DAR22.

Yes, that makes a difference. The reason why is, that it has to authenticate back to the att.net email server to send the message.

For example, in the webmail when you send a message it goes through the authentication process automatically, but when you use a client such as Outlook, Outlook has to ask the email server to authenticate.

Are you able to send the test message with no errors? Please let us know.

Matthew, AT&T Community Specialist