Philip Hazel wrote:
Don't forget about forwarding. Case (2) arises when a user arranges
for her "home" MTA to forward mail somewhere else, either permanently
or temporarily.
Another weird scenario is redirects, via Resent-* forwarding
--
Eric A. Hall http://www.ehsco.com/
Internet Core Protocols http://www.oreilly.com/catalog/coreprot/