Guild Wars 2

thanks, and i’m sorry for the link

hello everybody!
today i recived a weird email.
this is what it says:
Greetings!

It has come to our attention that you are trying to sell your personal Guild Wars account(s). As you 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 ArenaNet Entertainment’s employees. If you wish to not get your account suspended you should immediately verify your account ownership.

You can confirm that you are the original owner of the account to this secure website with:

Moderator note: Link removed for security reason.

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.

Regards,

Account Administration Team
Thanks! —The ArenaNet Team

Now: the strange fact is that i DON’T have a guild wars account (i’m posting this with my brother’s account).
My brother buy the game the last year but he (obviously) used his email.
So why i recived this email?
also, if i try to click the link firefox doesnt open it because it is unsafe.
What the hell is going on?