On Mon, Mar 30 2020, Brian May wrote: > This applies to all 4 of those messages. Yes, they all look like they > have the same Message-ID 4 different messages all with the same message ID definitely violates a core assumption of notmuch (that each message as a unique message ID). I think it would be reasonable to state that the behavior of notmuch is officially "undefined" in that case. -Carl
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