Hi,

you can do this by handling the events for the folders..

<code>
..
// get MAPI namespace
Outlook.NameSpace mapiNamespace = this.GetNamespace("MAPI");

// get Outbox Folder .. sent mails will be added there before sending
Outlook.MAPIFolder _outboxMailFolder =
mapiNamespace.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderOutbox);

// handle add item event
outboxMailItems.ItemAdd += new
Microsoft.Office.Interop.Outlook.ItemsEvents_ItemAddEventHandler(outboxMailItems_ItemAdd);
...
//the add item event handler:
void outboxMailItems_ItemAdd(object Item)
       {
           Outlook.MailItem _newMail = Item as MOutlook.MailItem;
           if (_newMail != null)
           {
               try
               {
                   //do whatever you want with the mail...
               }
               finally
               {
                   // send the mail (seems this is not done
automatically when handling the itemadd event...
                   _newMail.Send();
               }
           }
       }
...

Philipp
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