Same error appears if you try to sign in to Windows Live Mail.
The error message quoted is
Unable to send or receive messages for the Hotmail (rggraham1947) 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
The program will not report that it is unable to send or receive messages if the fault is a failure to sign in. That's why it's important to find out which process is throwing the error.
Why does this appear in the server properties?
http://mail.services.live.com/DeltaSync\_v2.0.0/sync.aspx
Has Microsoft/Windows Live changed this or is it malware?
regards,
rggraham1947