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From: Jeff Grossman (jeffstikman.com)
Date: Mon Jun 08 2009 - 10:40:27 CDT
On Mon, 8 Jun 2009 17:18:32 +0200, "Jack Knowlton" <jknowltonvp44.com>
> Hi all.
> Today, while sending an email, I monitored postfix's log. The message was
> going thru postfix and then relayed to the recipient's MX:
> Jun 8 13:03:21 dsrv postfix/smtpd: AADDD17B812:
> client=whatever[xx.xx.xx.xx], sasl_method=LOGIN,
> Jun 8 13:03:22 dsrv postfix/qmgr: AADDD17B812:
> from=<usermydomain.com>, size=1395, nrcpt=1 (queue active)
> Jun 8 13:03:24 dsrv postfix/qmgr: 4CF1A17D17C:
> from=<usermydomain.com>, size=1838, nrcpt=2 (queue active)
> Jun 8 13:03:24 dsrv amavis: (26650-04) Passed CLEAN,
> [xx.xx.xx.xx] <usermydomain.com> -> <xxxunimore.it>, Message-ID:
> <005f01c9e828$5f41bf50$1dc53df0$com>, mail_id: OXs5BXQ6GyU0, Hits:
> -4.012, size: 1395, queued_as: 4CF1A17D17C, 1939 ms
> Jun 8 13:03:30 dsrv postfix/smtp: 4CF1A17D17C:
> to=<user-out-backupmydomain2.org>, relay=172.16.0.10[172.16.0.10]:25,
> delay=6.5, delays=0.05/0.06/5.7/0.72, dsn=2.0.0, status=sent (250 2.0.0
> Ok: queued as 0F353B81E)
> Until here, everything was kosher. Amavis processed the message and
> postfix correctly applied the "sender_bcc_maps" setting.
> What I don't really get, is what happened next:
> Jun 8 13:04:14 dsrv postfix/smtpd: connect from
> Jun 8 13:04:17 dsrv postfix/smtpd: EFF8117B812:
> Jun 8 13:04:17 dsrv postfix/smtpd: disconnect from
> Jun 8 13:04:23 dsrv postfix/smtp: 4CF1A17D17C:
> to=<xxxunimore.it>, relay=polluce.unimo.it[188.8.131.52]:25, delay=59,
> dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 7EDDA26494)
> Jun 8 13:04:23 dsrv postfix/qmgr: 4CF1A17D17C: removed
> I understand the message was succesfully delivered to the recipient's
> server, but where the heck did EFF8117B812 come from?
> And where did it go, since there are no further traces in the logs of
> queue id?
I am by no means an expert at e-mail. But, my first guess would be that
the server at polluce.unimo.it did a test of the recipient of the e-mail.
It connected, tested the recipient e-mail address, and then disconnected.