Scan your computer for malware. You could be infected with a virus or
Spyware.
Note that default Outlook security will not allow malware to abuse Outlook.
Which version of Outlook are you using and at what patch level? Do you
perhaps have ClickYes installed? That application will break Outlook
security as it will confirm all the security alerts you'd normally get.
In the mean time, it would probably be best to place Outlook in Offline mode
via the File menu so none of the items could go out and would hang in your
Outbox where you can delete them.
