Can I Safeguard My ATT Email Login Credentials From Hackers?
To effectively safeguard your ATT Email Login credentials including your username and password from getting hacked or compromised, you will have to keep changing or resetting it from time to time (regularly). However, it can also be done if you do it twice or thrice a week for safety purposes. Moreover, you don’t need to share your password with anyone as they can use it to access your ATT email account without your permission and use it for negative purposes.
https://www.askfor-help.com/email/att-email-login/