Windows Mail Sending My Emails Rcv'd to someone

This is happening without my consent.
Some are actually making it to the other email server and being returned
while others are failing to send due to a server connection error. I got
eighty now that are errors.
It is not taking place on the webmail server, emails are not showing as
having been sent or returned, just in Windows Mail for that email address.
--
New World - As easy to fix as it would be to start building underwater
cities and interconnecting tunnels.
Michael @ Hotmail