On 4/4/16 5:45 AM, Jeremy Harris wrote: > On 04/04/16 13:01, Jim Fenton wrote: >> On 4/4/16 3:14 AM, Jeremy Harris wrote: >>> On 01/04/16 23:18, Viktor Dukhovni wrote: >>>> On Fri, Apr 01, 2016 at 06:48:00PM -0300, Chris Newman wrote: >>>>> I feel very strongly that policy for SMTP relay should be advertised by >>>>> SMTP and protected by SMTP TLS. >>>> Unfortunately, in MTA-to-MTA SMTP, the receiving SMTP server has >>>> no idea what domain the sending SMTP client wants to deliver mail >>>> to at the time that it advertises its ESMTP extensions in the EHLO >>>> response. >>> Why must it be done then? Why not at RCPT TO time, via some suitable >>> response? >> It's not even possible at RCPT TO time, for example if the message is >> being forwarded. > Has been forwarded, and the RCPT is post-forwarding? Rules for the > current recipient apply. > > Is about to be forwarded, and the RCPT is pre-forwarding? Rules > for the current recipient apply. > > I don't see your point; please elucidate?
Viktor's other comment was: > For this (and other related) reasons, in-band SMTP security policy > can only be communicated for the given SMTP server, and not the > recipient domain. I'm pointing out one of the other related reasons that isn't addressed by doing the response at RCPT TO time. -Jim _______________________________________________ Uta mailing list [email protected] https://www.ietf.org/mailman/listinfo/uta
