Ron,
this page describes what we add to message headers at our relays:
http://www.oucs.ox.ac.uk/network/smtp/tagging.xml?style=printable
(afaik it's accessible from the outside world)
as it happens, spamcop.net are responsible for the vast majority
of tagged messages. the price to be paid is in the accuracy of
their lists and the amount of collateral damage.
regards,
oliver.
* Ron McKeating <R.J.Mckeating@???> [2003-04-17 10:14:21 +0100]:
> out of 18 does not bode well for me. So can anybody advise me. Is it
> just that the free RBL service from JANET is not really very good, and
--
Oliver Gorwits, Network Software Group
Oxford University Computing Services