Seems like my problem is similar to others. My error code is as follows:

Unable to send or receive messages for the Msn account. Sorry, we were unable to sign you in to Windows Live ID at this time. Please try again later.

Server Error: 0x80048820
Server: 'http://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x80048820

Unable to send or receive email on "live mail". When opened I get the message " do you want to go online " but I am already on line. When ticked I then get an error message... Server  'mail. bigpond.com' Windows Live Mail error ID 0x800CCC0D. Protocol: POP3. Port: 110. (SSL) no.
All mail can be found on the Bigpond server. Telstra have tested and checked all settings.
Can you help ???