On Sat, 11 May 2002, Paul Smith wrote:
The difficult bits, at the moment, are: (1) knowing that the message has
come from a server authorized to transfer mail on behalf of hotmail.com,
and (2) if it's gone through multi-hop servers, checking that it's not been
faked in that part of the process.
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.
--
Philip Hazel University of Cambridge Computing Service,
ph10(_at_)cus(_dot_)cam(_dot_)ac(_dot_)uk Cambridge, England. Phone: +44
1223 334714.