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Re: Spam Recipe: Match Message-id: and From:

1998-04-26 07:14:48
At 05:31 AM 4/26/98 -0400, gsutter(_at_)pobox(_dot_)com wrote:

What legitimate mail clients don't add a Message-Id:?  If they don't,
they're violating RFC 822.

No, it's optional.

Stan