Possible Hacker?

[Gunderak]

Hey, just received an email from [email protected]
Here is what was in it.

Originally Posted by [email protected]

GRAALONLINE COMPUTER USAGE WARNING

Your Graal account (Graal780374) has been accessed from a different computer. If that is not intented, then it's recommended to change your Graal password immediatelly.

New Computer ID: 608614 (that computer also uses the accounts fowlplay4,k_killar,Darkmatters)
Password change URL: http://www.graalonline.com/accounts/lostpass

If you are receiving this message in error and you do not own this account, please ignore this email.

Best Regards,
GraalOnline Management

But why is fowlplay's and two other accounts in there?
I have already changed my password just in case.