troubleshooting Question

Spam from internal network?

Avatar of Silencer001
Silencer001Flag for Belgium asked on
5 Comments1 Solution385 ViewsLast Modified:
Hi everyone,

A customer of mine keeps getting spam emails from to They are using Trend Micro's Hosted Email Security for their spam. A policy is active to block * to *

Normally this would stop the spoofing, but the mails keep getting through. The strange thing is that the mailheaders don't point out that this mail is being filtered by trend micro. Maybe a client is infected with a virus that keeps sending spam?

This is the mailheader from the emails:
Received: from ( by
 ( with Microsoft SMTP Server id; Wed, 10 Aug 2011
 09:47:56 +0200
Received: from (account <> HELO	by (CommuniGate Pro SMTP 5.2.3)	with ESMTPA id 264460314 for
 <>; Wed, 10 Aug 2011 15:48:22 +0800
From: info <>
To: info <>
Date: Wed, 10 Aug 2011 09:48:22 +0200
Subject: Job Proposal
Thread-Topic: Job Proposal
Thread-Index: AcxXMdIw7Kk1fGVnRsaiFRZNzEmdpQ==
Message-ID: <>
X-MS-Exchange-Organization-SenderIdResult: None
X-MS-Exchange-Organization-PCL: 2
received-spf: None (SBS.theirdomain.local: does not designate
 permitted sender hosts)
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0

I hope some of you can shed a light on this.

Kind regards,
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