And done, the owner of the account will receive the reset password e-mail, nothing nefarious about it.
This. So if someone knows your email they can basically try to reset your password. But it wont work since they need your password. So its nothing to worry about. Just be careful with your GW2 account info. Scan your pc for keylogger. Dont give anyone ,even if they claim to be from arenanet, your password. Thats all folks.