Duplicate message with large attachment from Outlook

[zimico]

Dear all,
Today I received so many duplicate emails which sent from my coworker (email abc@example.com. Those emails have 18Mb of attachment.
Message headers show different ESMTP id.

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[root@sm02 ~]# cat /var/log/zimbra.log | grep 995F31812D0B4
Nov 18 17:14:53 sm02 postfix/amavisd/smtpd[24094]: 995F31812D0B4: client=localhost[127.0.0.1]
Nov 18 17:14:53 sm02 postfix/cleanup[11403]: 995F31812D0B4: message-id=<006801d59df7$01991430$04cb3c90$@example.com>
Nov 18 17:14:54 sm02 postfix/qmgr[13197]: 995F31812D0B4: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 17:14:54 sm02 amavis[25602]: (25602-10) i-9MFF1dc79A FWD from <abc@example.com> -> <xyz1@example.com>, <xyz2@example.com>, <xyz3@example.com>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 995F31812D0B4
[root@sm02 ~]# cat /var/log/zimbra.log | grep 13E8D1812D0A7
Nov 18 16:50:20 sm02 postfix/amavisd/smtpd[5210]: 13E8D1812D0A7: client=localhost[127.0.0.1]
Nov 18 16:50:20 sm02 postfix/cleanup[27158]: 13E8D1812D0A7: message-id=<003e01d59df5$0ee78560$2cb69020$@example.com>
Nov 18 16:50:20 sm02 postfix/qmgr[13197]: 13E8D1812D0A7: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:50:20 sm02 amavis[17960]: (17960-08) 1796olLb1o4U FWD from <abc@example.com> -> <xyz1@example.com>, <xyz2@example.com>, <xyz3@example.com>, BODY=7BIT 250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 13E8D1812D0A7

If I grep by size of this message

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[root@sm02 ~]# cat /var/log/zimbra.log | grep abc| grep 25356866
Nov 18 16:36:17 sm02 postfix/qmgr[13197]: 63BB91812D0A7: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:38:16 sm02 postfix/qmgr[13197]: 865041812D0A9: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:40:48 sm02 postfix/qmgr[13197]: C4F931812D0A7: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:43:08 sm02 postfix/qmgr[13197]: 324B21812D0A9: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:46:19 sm02 postfix/qmgr[13197]: 067661812D0A7: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:47:53 sm02 postfix/qmgr[13197]: D22761812D0A9: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:50:20 sm02 postfix/qmgr[13197]: 13E8D1812D0A7: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 16:56:19 sm02 postfix/qmgr[13197]: CFA4A1812D0A9: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 17:08:52 sm02 postfix/qmgr[13197]: B97671812D0B3: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 17:12:30 sm02 postfix/qmgr[13197]: E82A21812D0A9: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 17:14:54 sm02 postfix/qmgr[13197]: 995F31812D0B4: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)
Nov 18 17:18:07 sm02 postfix/qmgr[13197]: CA59E1812D0B5: from=<abc@example.com>, size=25356866, nrcpt=14 (queue active)

This mail was sent at 16:30 and when opening sent items on outlook, the time is 17:30. So I think Outlook has problem with network connection and retried to send multi time.... Does anyone see this issue?

We are using 8.8.15 OSE on centos 7.

Many thanks and best regards,
Minh.

[fayaz]

hi

there is option available in zimbra duplicated email should be deleted automatically you just enable that .