Event on “Item Sent” in Outlook

Question

I\'m using ApplicationEvents_11_ItemSendEventHandler (see http://msdn.microsoft.com/en-us/library/microsoft.office.interop.outlook.applicationevents_11_itemsend

Answer 1

If you use a modal dialog (WPF/Winforms MessageBox), you will only get the first event trigger. You must implement a non-blocking event handler (possibly an item queuing strategy).

Don't use the blocking UI call modal dialogs - Outlook will notice the UI is blocked and ignore triggering subsequent interrupts.

See this form post for reference.

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If you are worried about the users preferences for controlling Sent Item storage, just override them using the following snippet...

MailItem.DeleteAfterSubmit = false; // force storage to sent items folder (ignore user options)
Outlook.Folder sentFolder = ThisAddIn.Application.Session.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderSentMail);
if (sentFolder != null)
    MailItem.SaveSentMessageFolder = sentFolder; // override the default sent items location
MailItem.Save();