Question

Steps to take when getting Spam mail

Asked by: jaffan72

Hello all,

I have windows server 2009 with Exchange 07 running on it.  I have enabled the Anti-Spam option on the Hub transport and I have been using it to filter spam. but obviously some spam still comes in.  I need to know the steps to take to prevent those spam emails from coming again. For example I am getting a lot of spam emails from Facebook which I know now it contain a malware.  When I check the massage details its always from different IP address's and different domains.
Below is a sample of the massage detail on one of those massages.
What should I be looking for when I get such spam?  Which IP or Domain to block? What are the proper steps to take?

Received: from 14.214.205-77.rev.gaoland.net (77.205.214.14) by
 mycompany.com (10.6.0.9)  with Microsoft SMTP Server id
 8.1.311.2; Tue, 3 Nov 2009 09:58:19 -0700
Received: from 77.205.214.14 by mx.sina.net; Tue, 3 Nov 2009 17:53:27 +0100
From: Facebook <update+afiqsfw@facebookmail.com>
To: <user@mycompany.com>
Subject: new login system
Date: Tue, 3 Nov 2009 17:53:27 +0100
Message-ID: <000d01ca5ca6$2a672610$6400a8c0@holtqnzc5>
MIME-Version: 1.0
Content-Type: multipart/alternative;
      boundary="----=_NextPart_000_0006_01CA5CA6.2A672610"
X-Priority: 3 (Normal)
X-MSMail-Priority: Normal
X-Mailer: Microsoft Outlook, Build 10.0.3416
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1437
Importance: Normal
Return-Path: holtqnzc5@shuangdeng.sina.net
X-MS-Exchange-Organization-PRD: facebookmail.com
X-MS-Exchange-Organization-SenderIdResult: Fail
Received-SPF: Fail (mycompany.com: domain of
 update+afiqsfw@facebookmail.com does not designate 77.205.214.14 as
 permitted sender) receiver= mycompany.com;
 client-ip=77.205.214.14; helo=14.214.205-77.rev.gaoland.net;
X-MS-Exchange-Organization-SCL: 0
X-MS-Exchange-Organization-PCL: 2
X-MS-Exchange-Organization-Antispam-Report: DV:3.3.5705.600;SID:SenderIDStatus Fail;OrigIP:77.205.214.14
 

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Asked On
2009-11-03 at 11:18:29ID24868393
Topics

Anti-Spam Email Software

,

Exchange Email Server

Participating Experts
3
Points
500
Comments
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Answers

 

by: alanhardistyPosted on 2009-11-03 at 11:24:00ID: 25732484

Install a trial of Vamsoft www.vamsoft.com only $239 if you decide to buy. Brilliant at killing spam.

 

by: jaffan72Posted on 2009-11-03 at 11:28:13ID: 25732528


Thank you very much, I will defiantly try it, Bu I still need to know how it do with Exchange Anti Spam.
 
 
 

 

by: WraithbonePosted on 2009-11-03 at 11:34:39ID: 25732599

here is a complete guide in how to install it AND uninstall it: http://www.petri.co.il/install-anti-spam-exchange-2007.htm

hope this is what youre seeking :)

 

by: jaffan72Posted on 2009-11-03 at 11:38:11ID: 25732640

Thank you Wraithbone,  I have already installed it. I just need to know what to do to the spam that still gets throw.

 

by: WraithbonePosted on 2009-11-03 at 11:47:07ID: 25732734

you will need to set you imf filter higher.

take a look at this page: http://exchangepedia.com/blog/2007/02/exchange-2007-content-filter-how-to_07.html

 

by: WraithbonePosted on 2009-11-03 at 11:47:47ID: 25732745

ooh.. and if needed you can also whitelist specific domains ;)

http://exchangepedia.com/blog/2007/01/exchange-2007-content-filter-whitelist.html

 

by: jaffan72Posted on 2009-11-03 at 12:04:38ID: 25732955

thanx again Wraithbone, I have already done that.. but i am still getting Spam emails . let me try to explain my self better.
I am still getting spam emails after configuring all the above, I am assuming i should block the sender's email address , domain or IP address. if am correct how do i know these information from the massage detail i provided in the email erlier. specially that they always keep changeing.

 

by: WraithbonePosted on 2009-11-03 at 12:23:16ID: 25733159

this seems to be what youre looking for. with this you will be able to block for specific domains:

http://technet.microsoft.com/en-us/library/aa996920.aspx

please tell me if this helps you.

 

by: alanhardistyPosted on 2009-11-03 at 12:37:47ID: 25733328

Sorry about my earlier post - only so much you can do when driving!

Have a look through this article which may assist you further:

http://www.msexchange.org/articles_tutorials/exchange-server-2007/security-message-hygiene/exchange-server-2007-spam-filtering-features-without-using-exchange-server-2007-edge-server.html

 

by: bitMASTERSPosted on 2009-11-04 at 07:02:02ID: 25739979

The first line has the senders information.  Received: from 14.214.205-77.rev.gaoland.net (77.205.214.14) Unfortunatley the ip will change (that's what spammers do) and you will be chasing your tail trying to enter every ip you receive spam from as you have already very well found out.
 I know, I have done it and it is a never ending battle.  

My recommendation is to use connection filltering in your Exchange setup. Set up RBLs that will do the checking for you.  Most people will start out with zen.spamhaus.org but after much testing I have found that installing the following three RBLs in the order listed provides exceptional spam protection.  

1. Spamhaus (zen.spamhaus.org)
2. Barracuda (b.barracudacentral.org) You must register for this one but it's still free
3. UCEProtect-3 (dnsbl-3.uceprotect.net)

To find out which blacklists are effective is to  test the sending ip address (in the example you gave, 77.205.214.14) against blocklists at http://mxtoolbox.com/blacklists.aspx.  This ip happens to be on 9 different blocklists so using any one of those blocklists would have prevented that message from coming through.  As you get new messages with RBLs in place, you can continue testing until you find what works for you.  Again, my best results are the 3 RBLs listed above.

Please let me know if you need any additional assistance in setting your connection filtering up. There are some additional tools for testing if you need more info. In my opinion,  connection filtering is the best kept secret of Exchange.

 

by: bitMASTERSPosted on 2009-11-04 at 07:06:20ID: 25740024

For clarification in Exchang 2007 you will set up the Connection Filtering in the IP Block List Providers of the Anti-Spam tab in your Hub transport..  Simply enter your RBLs in that area.

20120131-EE-VQP-002

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