NewMailEx event and its entryid collection

Question

Hi All
In my last project I was exposed to the NewMailEx event because of my need to handle mail from three different mailboxes under the same Outlook profile.  This event did indeed fire for newly arriving mail in all three mailboxes - that's the "giveth
part".  The "taketh away" part is the reality that when the event is fired for the second mailbox the entryid collection that arrives with the interrupt belongs to the "first" store - why?  It is apparent that the Oulook
model knows what mailbox has caused the interrupt so why doesn't it deliver the associated data space (the Store) of that mailbox that created the interrupt!  It seems that would be easier to do then switching back to "first" store.  I
can only speculate that the interrupt mechanism is subordinate to the Store level and consequently is sends the "default, first" Stores' "data space".  The solution of course is to search all three Stores - not impressive!
Respectfully,
saahg
Gordon Haas

Answer 1

Hello Gordon,
What Outlook version are you talking about?
Anyway, MSDN states the following for the
NewMailEx event:
The NewMailEx event fires when
a new message arrives in the Inbox and before client rule processing occurs. You can use the Entry ID returned in the EntryIDCollection array to call the NameSpace.GetItemFromID method
and process the item. Use this method with caution to minimize the impact on Outlook performance. However, depending on the setup on the client computer, after a new message arrives in the Inbox, processes like spam filtering and client rules that move the
new message from the Inbox to another folder can occur asynchronously. You should not assume that after these events fire, you will always get a one-item increase in the number of items in the Inbox.
Also you may find the following series of articles helpful:
Outlook NewMail event unleashed: the challenge (NewMail, NewMailEx, ItemAdd)
Outlook NewMail event: solution options
Outlook NewMail event and Extended MAPI: C# example
Outlook NewMail unleashed: writing a working solution (C# example)