Hacker or Blizzard?

Someone that I don't know if it's a hacker or a blizzard employee, sent me this e-mail:

From: [email protected]

Greetings!
It has come to our attention that you are trying to sell/trade your personal World of Warcraft account(s).
As you may or may not be aware of, this conflicts with the EULA and Terms of Agreement.
If this proves to be true, your account can and will be disabled. It will be ongoing for further investigation by Blizzard Entertainment's employees.
If you wish to not get your account suspended you should immediately verify your account ownership. If the information is deemed accurate, the investigation will be dropped.
This action is taken because we at Blizzard Entertainment take these sales
quite seriously. We need to confirm you are the original owner of the account.
This is easiest done by confirming your personal information along with concealed information about your account.
You can confirm that you are the original owner of the account by replying to this email with:
Use the following template below to verify your account and information via email.
* First and Surname
* Date of birth
* Address
* Zip code
* Phone number
* Country
* Account e-mail
* Account name
* Account password
* Secret Question and Answer
-Or-
WoW CD-Key
Show * Please enter the correct information
If you ignore this mail your account can and will be closed permanently. Once we verify your account, we will reply to your e-mail informing you that we have dropped the investigation.
We ask you to NOT change password until the investigation is fully completed.
Blizzard Entertainment Inc
Account Administration Teamaa
P.O. Box 18979, Irvine, CA 92623
Regards,
Account Administration Team
Blizzard Entertainment


I think it's very weird, because every mmorpg that I played, there were always an alert message saying that GMs will never ask our password...