Research hotmail's mail setup and see if they have changed your account or the pop and/or smtp servers.
If you are accessing your hotmail through outlook, for example, it is possible your account/profile was corrupted. In which case you will have to go back and reconfigure it.
Hope this helps!
Last Wiki Answer Submitted: March 8, 2009 3:49 pm by Schmidtw11,205 pts.