Sender / recipient could be anyone as there are few hundred users.
As emails are deleted via retention, user's unread emails with read receipt request gets an email back.
I am getting about 5,000 of them across the firm per week.
Using just "Not read:" seems risky, just need to see if there is another definite filter that can be used. Adding a message contains "was deleted without being read" didn't
seem to catch anything for unknown reason.
I am doing a forward at the moment for testing.
---------------------
Your message
To: John Doe
Subject: Meeting This Friday
Sent: Monday, November 1, 2013 9:01:07 AM (UTC-08:00) Pacific Time (US & Canada)
was deleted without being read on Monday, April 13, 2015 1:14:45 PM (UTC-08:00) Pacific Time (US & Canada).
----------------------
Header
----------------------
Received: from mailserer1.company.local
([fe80::5555:5555:1111:1111]) by mailserver2.canyonpartners.local
([fe80::5555:5555:2222:2222]) with mapi id 14.03.0224.002; Mon, 13 Apr 2015
16:28:55 -0700
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: John Doe <jdoe@company.com>
To: "test@citi.com" <test@citi.com>
Subject: Not read: test email: December
09 2014
Thread-Topic: test email: December 09
2014
Thread-Index: AAHQFHweELDC0P7qOUuGOUa6kZWux51WWj6f
Date: Mon, 13 Apr 2015 16:28:54 -0700
Message-ID: <CF097956868555458A21E69D5D556B081255B39B@mailserver3.company.local>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-Exchange-Organization-SCL: -1
X-MS-TNEF-Correlator: <CF097956868555458A21E6555D956B081558B355@mailserver3.company.local>
MIME-Version: 1.0
X-MS-Exchange-Organization-AuthSource: mailserver1.canyonpartners.local
X-MS-Exchange-Organization-AuthAs: Internal
X-MS-Exchange-Organization-AuthMechanism: 04
---------------------------