I have been trying to email (msn) this friend of mine. the mail was going fine, until, sudden delivery failure?

my friend is using hotmail ID. i was talking to her via email, we exchanged about 10-15 emails in about 10 minutes, since, she dint have the messenger. but, in the next email i sent, SUDDENLY, the emails stopped going to her. i get message "POSTMASTER" email from the hotmail server,





saying "Delivery to the following recipients failed."





the ID is finely existing, and i dont think there is a problem with it. pls. suggest what the problem.

I have been trying to email (msn) this friend of mine. the mail was going fine, until, sudden delivery failure?
Tell her to clean her inbox, the storage is exceeded.