> Behalf Of wayne > > At some point there is a boundary between infrastructure the sender > > has control of and where he does not. That boundary is very clearly > > defined in my universe but even if it was ambiguous it would still > > exist. > > The problem is that for different identities, this "boundary" > is different. In particular, the boundaries between the SPF > identities (2821.MAILFROM and 2821.HELO) are different than > SenderID (PRA). The identities are completely irrelevant. The only relevant boundary is between what the sender controls and what they do not. All that any sender, forwarder or any other mail injector can ever be expected to do is to define the boundaries of the systems they control. Once that boundary is defined the definition is fair game for any party to use to interpret it to meet their operational needs. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf