My wife and I share a Hotmail account.  We each have a laptop running Windows Live Mail.  We each want to file or delete email without affecting the other person.  However, this doesn't happen by default.  Presently, if I delete an email in Live Mail, that email will shortly disappear from my wife's Inbox.  Is there anyway that I can disable that sync'ing?

To make things more complicated, we would like to retain sync'ing of calendars and contacts.  And, wife uses Windows Phone 7.5 as well as Live mail.