Probably does not help but I used Windows live mail and Mailwasher.
All my emails for outlook and live.com used to get removed by I assume mailwasher.
Had to save them to my NTL account to stop the being removed. Also if I opened a new email in Mailwasher it would not then download to my Windows live mail account.
Probably a way to stop that from happening but as my Mailwasher account has ran out I am just not going to renew it again. Maybe best contacting them for support.