From: Rosenwald, Jordan
Sent: Monday, October 24, 2011 4:16 AM
To: Murray S. Kucherawy; ietf-smtp(_at_)imc(_dot_)org
Subject: RE: SMTP traffic control
I know most major ISPs already provide that kind of data. It's not
difficult with existing response codes. Granted they're not in a
standard format (across ISPs). Given that any sender could mimic the
types of response codes the ISPs are using, but haven't, what level of
success can we really expect after a standardization effort?
I'm confused: Senders are clients, not servers, so what response codes are they
I think the proposal is to try to standardize what various servers are doing in
the area of expressing retry or rate policy so that clients can comply
universally rather than having to understand different syntaxes for different
servers. That seems like it can only be a benefit, as long as some critical
mass of servers intend to adopt it. And that, to me, is the real question.
How are the ISPs you know about conveying this information to clients at large?