Why can't people with hotmail address send me email?

my dad has a hotmail address, he sends email, gets a report back saying delivery failed or delivery delayed no need to re send, but i never get the email, has been happening for over a week now getting annoying, does any one know why?
Why can't people with hotmail address send me email?
Have you accidentally locked your dad's email address, or maybe your in box is full. Check out both
Reply:maybe you have accidentally blocked your dads email address or he mistypes your email address.
Reply:try askin a nother qwestion (:


(boaring)
Reply:this has been asked loads - next please