From: Russ Allbery (rra@stanford.edu)
Date: Tue Feb 03 2004 - 20:00:36 CST
Bruce Lilly <blilly@erols.com> writes:
> If there is a header field with an injection date, it should be a hint
> to an injection agent that re-injection may be taking place. What
> should gateways do with such a field?
Frequently, reinjection is a sign of a suck/rpost feed, and unfortunately
in some cases those are valid and intentional. Thankfully, they rarely go
through an intermediate gateway step as well.
Ideally, a gateway should retain the injection date, because so long as
it's still the same article, it should retain the same message ID and the
same injection date. That way, if it's later reinjected, it can be
rejected if the message ID is already seen *or* if the Date is too old,
which will prevent looping.
-- Russ Allbery (rra@stanford.edu) <http://www.eyrie.org/~eagle/>