[TSAdmin]

To elaborate on what Chris said, this can happen if you log in with a new computer or even if you accessed Graal using your account from a computer that you've never used it with before, but if you got this e-mail and you have not recently had any of the above, then changing your password was definitely the best thing to do. Since you say you logged in from Uni, that is likely what has happened. Changing your password once in a while doesn't hurt though.