I have Outlook 2000 on a Exchange 2000 server. Everytime when new mail messages arrives, without opening it or even highlighting the new mail, it marks as read or open envelope after few minutes. Checked all the settings in Outlook and everything is pretty much default. No rules applied and no preview pane open. What can be causing this to happen????? I searched Knowlegebase and nothing related to be found. Anyone had the same problem before? Need help!