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MS Exchange 2007 Anti SPam filter question

Posted on 2011-10-10
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Last Modified: 2012-06-27
Hi
We have the anti-SPam feature enabled on our MS exchange 2007 system and I am getting a lot of emails being filtered that I have no idea why.  I have attached an example (with users removed) below of one that is being quarentined but I have no idea why.  Is there something I am missing in the header ?

Diagnostic information for administrators:
Generating server: myserver.local
Receiver.name@myserver.lu
#550 5.2.1 Content Filter agent quarantined this message ##

Original message headers:

Received: from DNS02.aaa.aa (IP address) by mail.myserver.com
 (192.168.11.102) with Microsoft SMTP Server id 8.1.358.0; Mon, 10 Oct 2011
 14:54:08 +0200
X-TM-IMSS-Message-ID: <39fb580f0002d1ad@aaa.aa>
X-MimeOLE: Produced By Microsoft Exchange V6.5
Content-Class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: multipart/mixed;
      boundary="----_=_NextPart_001_01CC874C.BB7F3F5C"
Subject: Here are the photos that I want to share with you
Date: Mon, 10 Oct 2011 15:01:31 +0200
Message-ID: <5B4EE23F74711D4FAC808390F59D749D2EB681@Exchange02.aaa.aa>
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator:
Thread-Topic: Here are the photos that I want to share with you
Thread-Index: AcyHTLusohxfrve6R+CYo9YM/riMuQ==
From: SENDER<Sender.name@aaa.aa>
To: Receibver<Receiver.name@myserver.com>
X-TM-AS-Product-Ver: SMEX-8.2.0.1103-6.800.1017-18440.007
X-TM-AS-Result: No--6,700800-8,000000-31
X-imss-scan-details: No--7.431-10.0-31-1
X-TM-AS-User-Approved-Sender: No
Return-Path: Sender.name@aaa.aa
Received-SPF: None (LLLLLLL.myserver.local: sender.name@aaa.aa does
 not designate permitted sender hosts)
X-TM-AS-User-Blocked-Sender: No

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Question by:ianLMurdoch
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4 Comments
 
LVL 21

Expert Comment

by:Hendrik Wiese
ID: 36942469
To stop this from happening. Try the following in EMS:

Use this command to add the user to the whitelist
Set-ContentFilterConfig -BypassedSenders foo@somedomain.com

Open in new window


Use this command to add the domain to the whitelist
Set-ContentFilterConfig -BypassedSenderDomains somedomain.com

Open in new window

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Author Comment

by:ianLMurdoch
ID: 36942509
Thanks for the commands, which I will use to add domains and userts, but how do I know what rule or part of the filter is actually quarentining the message ?
The message received is just gobbledegook !  
It says #550 5.2.1 Content Filter agent quarantined this message ## but I have nothing in the content part of the filter to specify what should be removed

Regards
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Accepted Solution

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Hendrik Wiese earned 500 total points
ID: 36942552
See http://technet.microsoft.com/en-gb/library/aa996295.aspx for an introduction to Exchange's handling of Sender Policy Framework (SPF).

SPF allows a DNS domain to include a record which indicates which servers are authorised to send e-mail from that domain.  In your case, Exchange is telling you that the SPF record does not exist in DNS, which is pretty common.

Depending on how you've configured Sender-ID filtering, this may quarantine the message or do nothing.  It is likely that there are other causes for the message being quarantined.

Reference: SteveH_UK: http://www.experts-exchange.com/Security/Software_Firewalls/Q_22995811.html
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Author Closing Comment

by:ianLMurdoch
ID: 36947127
Thanks
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