Not sending. Outbox says 4 messages but displays only 3.

[Doug]

Outlook 2003 receiving OK, but won't send. Outbox shows only 3 messages but
syas there are 4. How can I delete the missing one?

 

[K. Orland]

The one you can't see is probably a stuck read receipt. Here's a link to
great information on how to deal with it:

http://www.howto-outlook.com/howto/deletereadreceipt.htm