It's from "noreply@battle.net" <bilmeister@aol.com>, it's got all sorts of typos, and claims blizzard wants faxed receipts of ID materials to restore the account... having had my account hacked then banned at one point, it's not how they work... if anyone else gets e-mails like this don't click the link plox.

Dear customer,

This is an automated notification sent from our account security system. You logined your account successfully at 2:32 on September 22th form the 125.21.167.*
range, but our system shows the 125.94.112.* IP range exists a large number of hackers. As too many customer complaints, the 125.19.169.* IP range has been
blacklisted. We are concerned about whether your account has been stolen. In order to guarantee the legitimacy of your account, we need you check your
account status here as soon as possible.
If you have any questions, please visit :
[bogus link to battllle.net removed by moi]

Account security is solely the responsibility of the accountholder. Please be advised that in the event of a compromised account, Blizzard representatives
will typically lock the account. In these cases the Account Administration team will require faxed receipt of ID materials before releasing the account for play.

Regards,

Blizzard account system
Blizzard Entertainmentc

Also, they will never send you a link when it contains ban/suspension information. They always tell you to call their billing/CS department.