Try a rule with a Run a Script option. I do not uses Run A script myself but it is the easiest method to describe. If the rule breaks change to ItemAdd. http://www.outlookcode.com/article.aspx?id=62
Sub AutoForwardByRunAScript(itm As mailItem)
Dim myItem As mailItem
Dim myRecipients As Recipients
Dim myRecipient As recipient
Set myItem = itm.Forward
Set myRecipients = myItem.Recipients
With myRecipients
.Add "jack"
.Add "jill"
.ResolveAll
End With
For Each myRecipient In myRecipients
If Not myRecipient.resolved Then
myItem.Display
GoTo ExitRoutine
End If
Next
myItem.send
ExitRoutine:
Set myItem = Nothing
Set myRecipients = Nothing
End Sub