Thanks to everyone for taking the time to read and give feedback.
On 13/11/2017 18:58, Steve Atkins wrote:
If the ISP were to publish the constraints that were applicable to SMTP from strangers they'd often be low enough that many senders wouldn't be able to comply with them while still delivering the mail they need to deliver, so I can't picture a choice of values to publish that would be of value to (or could be followed by) most senders.
That's what I meant, limits for "strangers"; because of course every peer who establishes any kind of reputation would be subject to limitations unique to that peer and that mail flow, and know better. It was meant to show a starting point for newly or rarely seen providers. On 14/11/2017 16:24, Ken O'Driscoll wrote:
However, Specialist MTA designed for bulk sending, such as GreenArrow or PowerMTA can be configured to control mail flow on a very granular level on a per provider, IP, MX etc. basis. They also support dynamically changing mail flow in response to throttling.
I am aware of how specialist MTA can assess sending limits on their own; what I was seeking was a less intrusive alternative to the de facto standard practice of slap-on-the-wrist-until-you-know, i.e. using throttling as signalling. After reading everyone's replies, I realize this is not as useful as I thought at first. In fact anyone using appropriate software would only have any use for this for the first handful of messages to somewhere new, which when you send volumes is a negligible part of the whole. And then you'd need to bump against the limits anyhow if you need to send more. I agree this is probably not worth pursuing. -- Federico _______________________________________________ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
