You are misleading us by editing out the rest of the sentence. What you stated is for dial-up service.

AT&T terms: >• with respect to dial-up accounts, using any software or device designed to defeat system time-out limits or to allow Customer's account to stay logged on while Customer is not actively using the IP Services or using such account for the purpose of operating a server of any type;

I have many servers on att internet, including email.