Is this Email Legit?

I got the following email today and when compared to the other emails I've received it looks like it might be legit, but you can never be sure. I did do a search but couldn't find anything like this. I did try to call billing but they're swamped and not accepting new calls at this time. There are a couple of things that bother me about this email - the missing 'is' before involved and the missing 't' at the end of entertainment. I removed the link just in case it is a bad one ( I also have not and WILL not click on the link.

Email received today:

An investigation of your World of Warcraft account
We have the evidence to prove that your account involved in the controversial game currency transaction .If your account is found violating Terms of Use, it can, and will be suspended/closed/or terminated.
We encourage you to keep the following security tips in mind when playing an online game on any computer:
If you did NOT make any changes to your account or subscription, we recommend you login to Account Management at the following link to review your account settings: (link removed)
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.
The World of Warcraft Support Team Blizzard Entertainment
Billing & Account Services
P.O. Box 18979, Irvine, CA 92623
Blizzard Entertainmen

**** Please can someone help. - I will also keep trying to get a verbal response but that may take a while.