How to Remove Mail From Server Outlook Express
- 1). Launch Outlook Express.
- 2). Click "Tools" in the main menu and then click "Accounts."
- 3). Click the "Mail" tab and highlight the email service that you want to alter. Click the "Properties" button.
- 4). Select the "Advanced" tab. Remove the checkmark next to "Leave a copy of messages on server." Click the "OK" button and restart your Outlook Express.
Source...