First of all, open your web browser and go to the page of AT&T sign-in for SBCGlobal email login.
Following that, you must correctly enter your user ID or email address.
After that, enter your email password correctly in the given field provided.
After you've carefully entered your login details, enter the button of sign-in.
See Also this post:- https://datarecovo.hpage.com/how-to-fix-sbcglobal-email-login-problems.html