On Mon, 11 Sep 2017 16:26:38 -0400 Joseph Brennan <brennan at columbia.edu> wrote: > When a message comes in with no Message-ID header, and MD passes it to > SpamAssassin, what is in the Message-ID that SA sees? Nothing at all. There's no Message-ID header in the message that gets passed to SpamAssassin. Regards, Dianne.