I have updated to win 10 and after that I am getting this message in Windows Live account.

Unable to send or receive messages for the *** Email address is removed for privacy *** account.
Server Error: 0x800488A6
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x800488A6

My two other emailaccounts worked fine using Windows Live Mail after the update to Windows 10