Either handle the Send event for the item or the Application.ItemSend event,
never mess with items that have been submitted for transmission.

--
Ken Slovak
[MVP - Outlook]
http://www.slovaktech.com
Author: Professional Programming Outlook 2007.
Reminder Manager, Extended Reminders, Attachment Options.
http://www.slovaktech.com/products.htm


"Richard" wrote in message
...
I am new to outlook add-in programming and have found that if I access
items
in the outbox, they are corrupted in some way that then prevents them
being
sent by outlook. It appears that the sentto date is not set to a valid
date.
This happens just be trapping the new item event on the outbox and tracing
some date from the mail item.