Re: [ietf-smtp] parsing SMTP replies (was: Proposed ESMTP keyword RCPTLI

On Wed, 17 Mar 2021 10:44:04 -0700, Ned Freed said:

> If past discussions are any indication, getting consensus on how to handle
> greylisting is going to be difficult. I don't want to make this document
> dependent on that.
The proposed text doesn't do anything to make that situation worse.  Pretty
much every MTA administrator that didn't just fall out of a tree already knows
that greylisting happens, and they have some already-decided way of
retrying.  The only thing this changes is that the receiving MTA now has a
way to tell the sending MTA "don't bother retrying for NN minutes".

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