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Re: [ietf-smtp] SMTP Greylisting Retry Hints

2019-02-05 10:24:49
On Tue, Feb 05, 2019, Hector Santos wrote:
Which smtp servers and client follow or honor Greylist SMTP retry hint for
rescheduling retries?

MeTA1 issues the retry time (server),
the client doesn't use it yet.

Quoting ChangeLog:

Add a retry=delay part to a graylisting reply, e.g.,
421 4.7.0 Come back later. retry=123
(see also draft-santos-smtpgrey-02)

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