[Exim] Strange headers ...

I got throught this list this message, i enclose its strange headers:

Return-Path: <exim-users-admin@???>
MIME-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Message-ID:
<B05C589D23F4AB459212A5FF14881B4A01C3F7@???
e.sb.de.netfab.net>
content-class: urn:content-classes:message
X-MimeOLE: Produced By Microsoft Exchange V6.0.4417.0
Thread-Topic: exim + cyrus + quota
Thread-Index: AcCjFI9RjIIO24aeRy+SuJjga3Z+dwAA/X2Q
EXPECIALLY THESE ONES:
X-Priority: 1
Priority: Urgent
Importance: high
From: "Alexander Biehl" <biehl@???>
To: <exim-users@???>
Subject: [Exim] exim + cyrus + quota
Sender: exim-users-admin@???
Errors-To: exim-users-admin@???
X-BeenThere: exim-users@???
X-Mailman-Version: 2.0.1
Precedence: bulk

How the message passed thought the list with a Priority set so
high ? (and in 2 copies !)