From: Victor Duchovni (Victor.DuchovniMorganStanley.com)
Date: Thu Sep 02 2004 - 15:14:53 CDT

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On Thu, Sep 02, 2004 at 01:58:23PM -0600, Kai Wang wrote:

>
> Hi,
>
> We are running postfix 2.0.3. I noticed that postfix assigned the same
> message ID to two messages.

QUEUE ID != Message id.

Queue ids are subject to reuse, but not during the same second (until
sub-microsecond mail injection, queueing and delivery becomes possible).

> [kwangmr2 kwang]$ zgrep DEB4936748 /var/log/maillog.2.gz
> Aug 31 12:58:26 mr2 postfix/smtpd[9150]: DEB4936748:
> client=smtp1.ucalgary.ca[136.159.36.18]
> Aug 31 12:58:27 mr2 postfix/cleanup[9232]: DEB4936748:
> message-id=<4134CB14.2000307ucalgary.ca>
> Aug 31 12:58:30 mr2 postfix/qmgr[6606]: DEB4936748:
> from=<SENDER1ucalgary.ca>, size=30623, nrcpt=1 (queue active)
> Aug 31 12:58:30 mr2 postfix/local[8900]: DEB4936748:
> to=<RECIPIENT1ucalgary.ca>, relay=local, delay=4, status=sent
> Aug 31 13:01:04 mr2 postfix/smtpd[8842]: DEB4936748:
> client=smtp1.ucalgary.ca[136.159.36.18]
> Aug 31 13:01:05 mr2 postfix/cleanup[9274]: DEB4936748:
> message-id=<4134CAED.8000907ucalgary.ca>
> Aug 31 13:01:05 mr2 postfix/qmgr[6606]: DEB4936748:
> from=<SENDER2ucalgary.ca>, size=2691, nrcpt=11 (queue active)
> Aug 31 13:01:05 mr2 postfix/local[9245]: DEB4936748:
> to=<RECIPIENT2ucalgary.ca>, relay=local, delay=1, status=sent
>

Adjust your expectations, queue ids are not forever unique.

--
        Viktor.

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