Emmett Culley:
> ---- snip email header ----
> Received: from den1.thisserver.net (den1.thisserver.net [198.202.202.21])
>       by g1.example.com (Postfix) with ESMTP id 3586C400032
>       for <webmas...@example.com>; Sun, 29 Nov 2009 02:15:59 -0800 (PST)
> Received: by den1.thisserver.net (Postfix, from userid 0)
>       id ; Sun, 29 Nov 2009 03:15:58 -0700 (MST)
> From: r...@den1.thisserver.net (Cron Daemon)
> To: webmas...@example.com
> Subject: Cron <r...@den1> /usr/lib/myco/rstcron
> Content-Type: text/plain; charset=UTF-8
> Auto-Submitted: auto-generated
> X-Cron-Env: <mailto=webmas...@example.com>
> X-Cron-Env: <SHELL=/bin/sh>
> X-Cron-Env: <HOME=/root>
> X-Cron-Env: <PATH=/usr/bin:/bin>
> X-Cron-Env: <LOGNAME=root>
> X-Cron-Env: <USER=root>
> Message-Id: <20091129101558.b0771588...@den1.thisserver.net>
> Date: Sat, 28 Nov 2009 03:15:01 -0700 (MST)
> ---- snip ----
> 
> Something (is assume cron) is putting the original sent date (last

Postfix adds the Message-Id: *AND* the Date: header when it moves
the submission from the maildrop queue to the incoming queue.

- The Date: header contains the time that the message was submitted
  to the maildrop queue (28 Nov 2009 03:15:01 -0700).

- The Message-Id:  header contains the time that the message was
  moved from maildrop queue to incoming queue. This is the same time
  as the "Received:  by den1.thisserver.net" header (29 Nov 2009
  03:15:58 -0700 which is MST, is identical to 20091129101558
  which is in UTC).

Please review my questions in my earlier follow-up response.  I
wrote most of Postfix, so I might have a clue. Is the mail queue 
on a file server, and is the clock drifted? Is the machine
running MacOS? They have modified the way that Postfix picks up
local submissions.

        Wietse

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