> On 25 Jul 2022, at 15:49, Luis E. Muñoz via mailop <mailop@mailop.org> wrote: > > On 24 Jul 2022, at 4:38, Laura Atkins via mailop wrote: > >> We’re trying to pull ‘what to do with a completely different message that >> might be sent in the future, possibly by a completely different sender' out >> of a signalling system that was never designed to convey that signal. And, >> yes, even the eSMTP codes RFCs are about this message in this SMTP >> transaction. They don’t convey what to do with future mail, either. > > This poses a (perverse?) choice on the sender side. > > In the current state of affairs, ESPs presume they know more than the > receivers, so they keep trying to send. Since the ESPs essentially disregard > the 5xx codes using the line of reasoning that you described,
The ESPs are not disregarding the 5xx. They’re actively respecting it, and not attempting a second delivery of the message that received the 5xx. laura -- The Delivery Experts Laura Atkins Word to the Wise la...@wordtothewise.com Email Delivery Blog: http://wordtothewise.com/blog
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