I get the message:  

Unable to send or receive messages for the oziguy..... account.
Server Error: 3204
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE20003

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I created the restore point :)
but cant find the rest of the information needed to go further with the fix 

I have two other emails that do work so don't understand why one won't work ??

Regards
Paul