On Sat, 22 Nov 2003 10:31:54 EST, "Richard O. Hammer"
Is there something which prevents spammers from sending their messages
with a null reverse path in the envelope? In other words, with
MAIL FROM: <>
in the SMTP exchange?
Thanks to the three who have posted responses to my question. By
reading between the lines I am guessing that there is indeed nothing,
in SMTP or other protocols or standard infrastructure, to keep
spammers from sending their messages with a null reverse path in the
envelope. The defenses against this kind of abuse are ad hoc,
possibly in violation of an RFC, and continuously being developed and
tested by any who can conceive of ways to deal with it. Is it
accurate for me to surmise that?
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address. If you feel that I have wronged you, you can come find me.)