I don't know if it has anything to do with what
happened to you, but I'll paste it anyway:
"Don’t let your account freeze up!
Did you know that if your account goes over the
2MB storage limit, it will automatically be
You won’t be able to send any messages
All e-mails sent to you will bounce back
Your account will stay frozen until you delete
enough e-mail to put you under the 2MB limit.
need to keep monitoring it to make sure you stay
well under the limit.
The better option is to sign up for MSN® Extra
Storage. For only $19.95* per year (less than $2 a
month) MSN Extra Storage gives you 10MB of
storage — five times what you’re getting today.
easiest way to avoid a frozen account."