Emails from "Blizzard"

This is a copy of an email I received . Of course I am going to change my email now, but the only sites I ever visit are those that tell me the popular builds and gems and wowwiki. I do have an authenticator and I have not been hacked, just need to know if there is anything I can and should do.

Sent By:

[email protected] On: Jul 07/03/10 9:42 AM
On Behalf Of: [email protected]
To: (My email was here)
Reply to: [email protected] you ignore this mail your account can and will be closed permanently

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.
If you ignore this mail your account can and will be closed permanently. Once we verify your account,
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.
When we carry out a routine check when the account, we have evidence to show that your account has been involved in the disputed transactions.
that your account involved in the controversial game currency transaction .The investigation will be continued by Blizzard administration to determine the action to be taken against your account.
This is easiest done by confirming your personal information along with concealed information about your account.
Please keep this email for your reference until the account recovery process has been completed.
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.
we recommend you Login verify Information your account:

<link was listed here>
Only Account Administration will be able to assist with account retrieval issues.
Thank you for your time and attention to this matter,
and your continued interest in World of Warcraft.
Blizzard Entertainment Inc Account Administration Team
P.O. Box 18979, Irvine, CA 92623'

These people are relentless.