I've also had this problem as well. But no you're not having problems with your email. It's just MSN and hotmail messing about. It happens quite often. I often get emails with loads of letters in them such as AAAAAAAAAAAZZZZZZZZZZZ etc and a really funny email address that I knew that I have never seen before.
Just ignore them and delete them. It's nothing to do with you. Hope that helps. Love, Becky xxxxxxxxx
Becky