I have a user who receives about 3-5 emails a day that have nothing in the From field, nothing in the subject, and nothing in the content. The full header of the email is:
Date: Mon, 19 Aug 2013 21:22:15 -0500
Subject:
Thread-Index: Ac6dTBYOeV4+FGxuTXexjwdLSDsGMw==
Message-ID:
<FCA568E56C1F424B991FC27C45F41B0254A8EA3FDA@gal02.tandtmarine.local>
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-gfi-me-message-id: <7DD8131516F15112915400000210@GAL02>
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
When I look at the message tracking log for this, it shows the messageid, messagesubject, and sender is blank (empty). However it has a legitimate returnpath. The returnpath value changes but is always an internal valid email address.
Looking at about 200 tracking entries with EventId DELIVER, the only ones that do not have a MessageId are these crazy ones always to the same recipient