On Mar 25, 2010, at 1:56 PM, Murray S. Kucherawy wrote:
I said this to Jeff in person at IETF but here it is for the list:
It's my understanding that this was based on a collection of various SMTP
text replies being returned by various ISPs when objectionable content is
presented for delivery. Some similarities were noted, and then some
consolidation was attempted and aligned using the proposed x.8.y codes.
There is to date no actual implementation of this, and no information about
how agents that observe these codes during SMTP transactions (i.e. senders)
would respond to them. That is to say: There's no implementation at either
end yet.
I think that's fine for Informational or Experimental, but this draft is
seeking Proposed Standard status. I'd like to see the results of some
implementation experiments at least.
Yup, me too. I'd also be curious how the most common MTAs (sendmail, postfix,
exchange, etc) react to reply codes they've never seen before. They /should/
handle 'em gracefully, but there could be surprises.
There's been some talk on one of the MAAWG lists about this, but it's
members-only; I'll encourage the participants to repost their comments here.
--
J.D. Falk <jdfalk(_at_)returnpath(_dot_)net>
Return Path Inc