For the email issue of AT&T, you can reach customer support at the toll-free number +1-877-334-7149. This number is your go-to solution for recovering your BellSouth email, fixing issues, and even for AT&T-related problems. Below, we will explore several common questions and step-by-step solutions to email and network problems.
Source: https://www.devex.com/people/how-do-i-regain-access-to-my-bellsouth-email-2032216