Keith Moore wrote:
so the message gets to its destination, and the delivery report
feature isn't supported, so an error is triggered. since the
destination doesn't know what the request is the only reasonable
thing to do is to bounce the message.
SMTP extensions work that way today. The difference is that options not in
the alert list can produce a warning rather than a failure.
--
Eric A. Hall http://www.ehsco.com/
Internet Core Protocols http://www.oreilly.com/catalog/coreprot/