My Inbox messages have gone to my sent items
 

Suddenly without warning all my inbox messages from one account only (of 2)
have automatically relocated to my sent items folder. This happened without
shutting down, it did this when i left my PC for 30 minutes. I thought they
were all deleted until I saw them in my sent items - which now has mail sent
to ME! I have not adjusted any settings etc - not intentionally anyway, I
am using Outlook from Office 07 with Vista