THIS HAPPENED A COUPLE OF MONTHS AGO...HERE WE GO AGAIN!

I also realized yesterday, my "Sent" mail is not in my "Sent" folder.

Unable to send or receive messages for the Msn (*******) account.

Server Error: 4201
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE00002

Any solutions?