If you recently made the switch from POP3 to IMAP configuration in Outlook 2007, you might be wondering why deleting an email from your inbox doesn’t actually remove the message.
Simply follow these steps to customize your Outlook toolbar and you will soon be able to permanently remove emails from your inbox.
UPDATE: If you don't want to permanently delete messages, you can hide deleted items from your inbox by choosing Current View > Hide Messages Marked For Deletion from the View menu at the top of your screen.
Posted April 27, 2011