Just start spamming AT&T like you've been spamming this site and I'm sure they'll delete your account for you......... I'm still waiting for you to unfollow me.
How do you delete an AT&T email account?
Go to account settings and scroll down to the bottom.
Click on the option delete account. It will ask you for confirmation and then your account is deleted.
If you have multiple accounts do the same to every account.
Hope it helped:)
Visit: emailloginhelp.org
my at&t account loginat&t wireless sign in