''duplicate of [/questions/1145762] - locking'' I get junk emails from spammers using invalid email address, such as: <info@Wc1z9.live.co.uk> When I try to block the junk address, I get the message: "The specified user <info@Wc1z9.live.co.uk> wasn't found or is invalid. Please make sure you have typed the name correctly." Why can't I block emails from invalid email addresses??? If the address is invalid, why do you allow me to receive the junk/spam email in the first place?