We're happy to help with this! Can you provide us with the domain of the email address, and if you have a current account tied to the email address? If so you can reset the password by logging into your account or using the myAT&T app. To learn more steps on changing the password check out this How to Reset you Email Password support article. Usually this will solve the issue, we hope this helps!
James C., AT&T Community Specialist
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