Why can’t I access my AT&T net email?

BellSouth was a telecommunications company founded in 1984, following the AT&T divestiture. Headquartered in Atlanta, Georgia, it provided telephone, internet, and wireless services across nine southeastern U.S. states. In 2006, AT&T acquired BellSouth, integrating its network and customers, expanding AT&T’s influence in the telecommunications industry.

Source: https://central.xero.com/s/question/0D58V00009OzKG8SAN/18336525855-why-cant-i-access-my-att-net-email