On Wed, 26 Feb 2003 19:49:15 -0800, ietf1@ka9q.net wrote: [snip] > >There is precedent for the IAB taking a stand on this sort of >thing. In particular, RFC2775 on "Internet Transparency" expresses the >view that the end-to-end principle that underlies the Internet >architecture is still vitally important and worth preserving. Although >RFC2775 spoke mainly to the problems introduced by the widespread use >of NATs, spam filtering is mentioned in passing. > Thanks for the reference to RFC2775 which I have now read. I understand it to say end-to-end transparency with unique addresses was the guiding principle in the days of essentially limitless IP addresses and an environment of trust. It then seems to go on to say that there are now valid reasons (having to do with shortage of IP addresses under IPv4 and with insecurity from the rabble now infesting the Net) which have produced an acceptable limitation on the earlier guiding principle. I may read this wrongly and welcome correction. Jeffrey Race