Dear Sirs,

     Running postfix 2.8.2 on FC5.

     We have a customer who receives two e-mails at 9:00am every
seven days from a mission critical customer of theirs.

     The first e-mail is to one user, and the second is to 5.

     On Oct 2, 2015, our server received the two emails, postgrey
approved of all 6 receipients, and then the email vanished into thin air
as is shown below by the absence of two postfix/qmgr lines that usually
fire up to deliver the e-mail.

As I am being held to account for this failure of our mailserver, I would love some help getting an understanding of how this can even happen and perhaps some way of chasing it down.

     I checked the mail logs going back for months and delivery
has been perfect except on this one day.  Kernel logs show nothing of
import, no crashes, no errors, no reboots, no nothing.

     Thanks for your help,

     Homer W. Smith
     CEO Lightlink Internet

     Here is a proper and expected sequence on a day it worked properly.
Lines showing actual delivery after the qmgr lines have been left out.

20150926.mail:Sep 25 09:01:45 light postgrey[7309]: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=j...@howellpkg.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: AC4C87C746: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: ACF307C747: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: AC4C87C746: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: AC4C87C746: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=r...@howellpkg.com 20150926.mail:Sep 25 09:01:45 light postgrey[7309]: AC4C87C746: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20150926.mail:Sep 25 09:01:46 light postgrey[7309]: AC4C87C746: action=pass, reason=client AWL, client_name=mail1.bemta7.messagelabs.com, client_address=216.82.254.100, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20150926.mail:Sep 25 09:01:46 light postfix/qmgr[13835]: ACF307C747: from=<ssrs_d...@corning.com>, size=126468, nrcpt=2 (queue active)
20150926.mail:Sep 25 09:01:46 light postfix/qmgr[13835]: AC4C87C746: 
from=<ssrs_d...@corning.com>, size=126468, nrcpt=6 (queue active)

     Here is the day it didn't work properly, notice the missing
posfix/qmgr at bottom of the sequence.

20151003.mail:Oct 2 09:02:04 light postgrey[28442]: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20151003.mail:Oct 2 09:02:09 light postgrey[28442]: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=j...@howellpkg.com 20151003.mail:Oct 2 09:02:08 light postgrey[28442]: CC97480258A: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20151003.mail:Oct 2 09:02:10 light postgrey[28442]: 363FA7DFC4: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151003.mail:Oct 2 09:02:10 light postgrey[28442]: 363FA7DFC4: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151003.mail:Oct 2 09:02:10 light postgrey[28442]: 363FA7DFC4: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=r...@howellpkg.com 20151003.mail:Oct 2 09:02:10 light postgrey[28442]: 363FA7DFC4: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151003.mail:Oct 2 09:02:10 light postgrey[28442]: 363FA7DFC4: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.205, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com

     Another proper sequence 7 days later.

20151010.mail:Oct 9 09:01:01 light postgrey[2602]: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=j...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A14977C433: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=d...@howellplastics.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A1F3D7C437: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A1F3D7C437: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A1F3D7C437: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A1F3D7C437: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=k...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postgrey[2602]: A1F3D7C437: action=pass, reason=client AWL, client_name=mail1.bemta8.messagelabs.com, client_address=216.82.243.202, sender=ssrs_d...@corning.com, recipient=r...@howellpkg.com 20151010.mail:Oct 9 09:01:01 light postfix/qmgr[17806]: A14977C433: from=<ssrs_d...@corning.com>, size=137677, nrcpt=2 (queue active)
20151010.mail:Oct  9 09:01:02 light postfix/qmgr[17806]: A1F3D7C437: 
from=<ssrs_d...@corning.com>, size=137677, nrcpt=6 (queue active)

------------------------------------------------------------------------
Homer Wilson Smith   Clean Air, Clear Water,    Art Matrix - Lightlink
(607) 277-0959       A Green Earth, and Peace,  Internet, Ithaca NY
ho...@lightlink.com  Is that too much to ask?   http://www.lightlink.com

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