got an empty email from root

this morning I found the following email from root:

Code:

Return-Path: <[email protected]>
Received: from localhost (localhost [127.0.0.1])
     by h1550830.stratoserver.net (Postfix) with ESMTP id 8F8182E6021F
     for <[email protected]>; Wed, 6 May 2009 07:00:02 +0200 (CEST)
X-Virus-Scanned: Debian amavisd-new at h1550830.stratoserver.net
X-Amavis-Alert: BAD HEADER SECTION, MIME error: error: unexpected end of
     header
X-Spam-Flag: NO
X-Spam-Score: 3.644
X-Spam-Level: ***
X-Spam-Status: No, score=3.644 tagged_above=3 required=4 tests=[AWL=-3.646,
     EMPTY_MESSAGE=0.607, MISSING_HB_SEP=2.5, MISSING_SUBJECT=1.285,
     NO_RELAYS=-0.001, TVD_SPACE_RATIO=2.899]
Received: from h1550830.stratoserver.net ([127.0.0.1])
     by localhost (h1550830.stratoserver.net [127.0.0.1]) (amavisd-new, port 10024)
     with ESMTP id f33Oj3Pfox1Z for <[email protected]>;
     Wed, 6 May 2009 07:00:02 +0200 (CEST)
Received: by h1550830.stratoserver.net (Postfix, from userid 0)
     id F3CF92E60229; Wed, 6 May 2009 07:00:01 +0200 (CEST)
Message-Id: <[email protected]>
Date: Wed, 6 May 2009 07:00:01 +0200 (CEST)
From: [email protected] (root)
To: undisclosed-recipients:;
Subject: [spam]

I'll look at my cron jobs and see if anything should run at 7am otherwise, will check mail log. Any other hints what this could be?

 

but it obviously comes from my system, I think its something sent by cron or another automated tool, that got interruptes, the whole SPAM classification comes from the email not being "complete" missing headers, etc. I must go check cron...