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Is it possible to create an outlook macro such that when a user presses "Reply to All", there is a prompt saying something like "Your message will be sent to the following recipients: x,y,z. Are you sure? Y/N". The key question here is if there is even a hook available to interrupt the action at all.

Note that I am not looking to disable it or to buy an add-in.

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If that came default in Outlook, imagine all the savings in Inbox flooding! – digitxp Aug 24 '11 at 19:20
Is it that you don't want to use an add-in, or just don't want to use one you have to pay for? – Ƭᴇcʜιᴇ007 Aug 24 '11 at 20:14
It's the cost. I'm looking for a solution that can be deployed to around 100 machines. – Adam S Aug 25 '11 at 16:14
up vote 4 down vote accepted

Note: I'm working on 2007, but I think the code should transfer OK.

You can add an event handler via VBA to pick up the ReplyAll event. Something like the following:

Dim WithEvents insp As Outlook.Inspectors
Dim WithEvents mailItem As Outlook.MailItem

' This is called on Outlook startup
Private Sub Application_Startup()
    Set insp = Application.Inspectors
End Sub

' This is called when a new Inspector is created. You use it to pick up on a new mail item event
Private Sub insp_NewInspector(ByVal Inspector As Inspector)
    If Inspector.CurrentItem.Size = 0 And Inspector.CurrentItem.Class = olMail Then
       Set mailItem = Inspector.CurrentItem
    End If
End Sub

' Called when you press ReplyAll
Private Sub mailItem_ReplyAll(ByVal Response As Object, Cancel As Boolean)
    Dim msg As String
    Dim result As Integer
    msg = "Do you really want to reply to all?"
    result = MsgBox(msg, vbYesNo, "Reply All Check")
    If result = vbNo Then
        Cancel = True
    End If
End Sub
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protected by Community Feb 11 '14 at 21:29

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