To correct this issue you will need to find out
where you Store Folder is located. You can find this in OE by clicking on
Tools - Options - then the Maintenance Tab. Click on the button "Store
Folder". Click in the long folder location and scroll all the way to the
right so you can see and write down the entire folder string. Close out of
Outlook Express. Next you will need to locate the folder on your hard
drive. More than likely it is a "hidden" folder so you will need to
"un-hide" the folder. Start off by opening a Windows Explorer window
(right click on your Start button, then left click on "Explore"). Now
click on "Tools" - "Folder Options". Next is to click the "View" tab at
the top of this window. Then look in the "Advanced settings" window for
"Show hidden files and folders". Click the circle to put the dot in it.
Click OK to finish that screen.
Now, in the left hand column, drill down to your
STORE FOLDER. Remember, that is the one you wrote down previously. It will
look something like this, C:\Documents and Settings\~my computer~\Local
Settings\Application
Data\Identities\{53C0RKG2-9063-47G1-A6SB-20CBCC70D21F}\Microsoft\Outlook
Express. Once you have "drilled" down to that folder you need to
rename the Sent file. Locate the file "sent.dbx". Place your mouse over it
and press the right mouse button. Scroll down to "rename". Now change the
name to something like sent.db0. Now open Outlook Express and click on
Send/Receive. If everything has gone correctly your previous messages that
are in the Outbox have sent, the Outbox is empty and the sent messages are
in the newly created Sent folder.