Deleting E-Mail Messages Permanently in MS Outlook
To delete e-mail messages from Microsoft Office Outlook:
1. Select the e-mail messages that you want to delete. You can select messages that appear in your mailbox consecutively by holding down the SHIFT key while clicking the first and last messages that you want to delete from the list. Alternately, hold down the CTRL key while you click the individual e-mail messages that you want to delete.
2. Hold down the SHIFT key and press DELETE to permanently delete your selected e-mail messages.
3. To complete the deletion, you must confirm it in the dialog box that appears when you close Outlook. But be careful, because permanently deleted e-mail messages are eliminated immediately, not stored in the Deleted Items folder. In other words, they cannot be recovered if you find you've made a mistake.