On Tue, Aug 25, 2026, at 16:10, John Levine wrote: > I can think of lots of reasons I'd have more Message-Instance than > Received in a single message. Say if a message goes through a mailing > list and the list software and the MDA mutate it twice on the same > machine.
Yes but by the same token I can think of plenty of situations where nothing changes but the envelope, where there's another signature and no new M-I (every dkim preserving forwarder now should match this profile) - so if there's 31 of those it's ALSO rediculous. I might be tempted to extend that number to 63, but also. Maybe we should put this in the BCP so we can tune it, and have the spec just allow for a PERMERROR if too many hops. Bron. -- Bron Gondwana, CEO, Fastmail Pty Ltd / Fastmail US LLC [email protected]
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