#4 - Dec. 12, 2009, 5:08 p.m.
It's possible that this e-mail is an impostor designed to fool you into clicking a link containing a keylogger or a form to fill out to give a malicious party your account information. If you did not change your password and your password still works, please disregard the e-mail and consider the possibility of changing your registered e-mail address to an entirely new e-mail used solely for Battle.net.