Original title: Server Error: 3204

I have followed the threads on here and tried the fixes for the error below but no matter what I try I still get this same error.

Unable to send or receive messages for the Live.co account.

Server Error: 3204
Server: 'https://mail.services.live.com/DeltaSync_v2.0.0/Sync.aspx'
Windows Live Mail Error ID: 0x8DE20003

Could someone please help.