Avoiding insertion of a redundant suffix to recipient's Email

Running Outlook 2007, an Expert has assisted me in coding a script which appends a suffix to the recipient's Email address.  For details, please see http://www.experts-exchange.com/Programming/Languages/Visual_Basic/Q_28374041.html

This works just as I had hoped, but there is a small, unexpected issue.  I have Outlook configured to suspend "sent" messages in the Outbox until a second instance of Send/Receive is executed.  Sometimes I need to review an outbound message, before sending it, and this approach allows me to do that.  If I open a message in the Outbox, make any changes, and then send it, the script appends a second suffix to the recipient's Email address.  If I'm paying attention, of course I will delete the redundant suffix.  However, if there's an easy way to adjust the script so that another suffix won't be added, I'd like to know.
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ddantesAsked:
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David LeeCommented:
That's simple enough.  This should do it.  Replace the code you have now with this version.

Dim bolAddSuffix As Boolean

Private Sub Application_ItemSend(ByVal Item As Object, Cancel As Boolean)
    Dim olkRcp As Outlook.RECIPIENT, olkNew As Outlook.RECIPIENT, intCnt As Integer
    If bolAddSuffix Then
        If Item.Class = olMail Then
            For intCnt = Item.Recipients.Count To 1 Step -1
                Set olkRcp = Item.Recipients.Item(intCnt)
                olkRcp.Resolve
                If InStr(1, LCase(olkRcp.Address), "whoreadme.com") = 0 Then
                    Set olkNew = Session.CreateRecipient(olkRcp.Address & ".whoreadme.com")
                    olkNew.Resolve
                    olkRcp.Delete
                    Item.Recipients.Add olkNew
                End If
            Next
            Item.Recipients.ResolveAll
            Item.Save
        End If
    End If
End Sub

Sub ToggleAddSuffix()
    bolAddSuffix = Not bolAddSuffix
    MsgBox "AddSuffix is now " & IIf(bolAddSuffix, "ON", "OFF"), vbInformation + vbOKOnly, "Toggle Add Suffix"
End Sub

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ddantesAuthor Commented:
Perfect.
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