This file is located deep within the user profile folder for safe keeping. Unlike Outlook Express that stores the Inbox, Outbox, Sent and other folders in individual DBX files, MS Outlook stores all Emails, Contacts, Calendar and everything else you see in a single file in its own. In order to back up your emails, we recommend that you first delete all unwanted and junk emails and later compact the main email storage file. Let’s take you through the entire procedure of safely backing up your emails and rectifying the problem. However, before you attempt the following procedure, you will need to take a backup of your Outlook emails in a safe place. Removing this email or solving this error is a bit dicey, but not impossible. If you are seeing messages being sent out without anything in your outbox, it could be a read receipt or a corrupted email. Messages are being sent, but actually there are none