On Tue, 21 Aug 2007, John C Klensin wrote: > > Put differently, there is a community for whom a "we are not willing to > receive mail except from known, authenticated, and trusted senders" > solution would be sufficient to control what that community considers > spam. Those people can use SMTP with authentication between relays - e.g. using TLS (cf. XMPP), or SASL, or CSA, etc. Tony. -- f.a.n.finch <dot@xxxxxxxx> http://dotat.at/ IRISH SEA: SOUTHERLY, BACKING NORTHEASTERLY FOR A TIME, 3 OR 4. SLIGHT OR MODERATE. SHOWERS. MODERATE OR GOOD, OCCASIONALLY POOR. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf