A family of Microsoft word processing software products for creating web, email, and print documents.
Although the methods and properties for routing slips are still present in Word VBA, they cannot be used any more starting with Word 2007.
Try this instead:
Sub Test()
Options.SendMailAttach = True
ActiveWindow.EnvelopeVisible = True
With ActiveDocument.MailEnvelope.Item
.Subject = "Testing 123"
.Recipients.Add "******@somewhere.com"
End With
End Sub