In article <[email protected]> you write:
>Why is the state of the message-id important?   You have mentioned it twice.

A great deal of mail software assumes that if two messages have the
same message-ID, they're the same message. We use this to avoid
showing the user the same message twice, e.g., if one copy arrives
directly and another via a list.

This has been standard practice for decades. I'm surprised you're not
familiar with it.

-- 
Regards,
John Levine, [email protected], Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly

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