When I was using Windows Live Mail today, all of a sudden the send/receive stopped working.

I get this in a popup:

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

Server Error: 4102
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE00001

There are no messages stuck in my Outbox.

I have not tried all the troubleshooting steps that I've seen on these forums yet, because I see several messages where Microsoft says give me your address and I'll check it out on our end. So I'd like to ask y'all to do that first.