Summary: Cybercriminals are pushing fake AT&T e-mails in the hopes you’ll think you forgot to pay your bill. This is a scam: the links inside do not point to AT&T but a website that tries to put malware on your computer.
http://www.zdnet.com/malware-warning-your-at-and-t-bill-is-ready-to-be-viewed-7000002121/