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filtering spams pretending from legit domain.

We receive many spams pretending someone with legit domain name. How do I block this? I have GFI spam filter, but want to know what the general technique to do it such as checking reverse domain lookup or SPF. I enabled both in the past, since many sending email servers out there were not probably setup, I noticed more false positive, though.

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Julian123

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crcsupport

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So just add zen.spamhaus.org to get beneift of 3 block list?
I think I used it long time ago, don't know why I stopped using..

crcsupport

ASKER

Looking at header, how do I know if it's from legit domain or someone pretending from the forged domain? I need help to interpret the routing part of the header

"Microsoft Mail Internet Headers Version 2.0
Received: from 70-35-36-45.static.wiline.com ([70.35.36.45]) by mail.xxxxx.com with Microsoft SMTPSVC(x.x.xxx.xx..xx);
       Fri, 21 Jun 2013 12:18:35 -0400
Received: from unknown (HELO uslitintrl01.us.lexisnexis.com) ([10.69.142.113])
by uscwygtw06.dnb.com with ESMTP; Fri, 21 Jun 2013 08:18:32 -0800
Received: from dbpliupap113.us.dnb.com ([158.151.64.113])
by uslitintrl03.us.lexisnexis.com with ESMTP; Fri, 21 Jun 2013 08:18:32 -0800
Date: Fri, 21 Jun 2013 08:18:32 -0800"

complete header is below.

HEADER INFO
======================
X-Antivirus: xxxxx for E-mail
Microsoft Mail Internet Headers Version 2.0
Received: from 70-35-36-45.static.wiline.com ([70.35.36.45]) by mail.xxxxx.com with Microsoft SMTPSVC(x.x.xxx.xx..xx);
       Fri, 21 Jun 2013 12:18:35 -0400
Received: from unknown (HELO uslitintrl01.us.lexisnexis.com) ([10.69.142.113])
by uscwygtw06.dnb.com with ESMTP; Fri, 21 Jun 2013 08:18:32 -0800
Received: from dbpliupap113.us.dnb.com ([158.151.64.113])
by uslitintrl03.us.lexisnexis.com with ESMTP; Fri, 21 Jun 2013 08:18:32 -0800
Date: Fri, 21 Jun 2013 08:18:32 -0800
From: "LexisNexis" <einvoice.notification@lexisnexis.com>
To: <xxxx.xxxx@xxxxxxxx.com>,
      <xxxx@xxxxxxxxx.com>
Message-ID: <228014310.11702817837043755.JavaMail.www@smtp-gw.us.lexisnexis.com>
Subject: Invoice Notification for June 2013
MIME-Version: 1.0
Content-Type: multipart/mixed;
      boundary="----=_Part_3600_128155292.1069652046677"
X-Nonspam: None
Return-Path: no-reply@intuit.com
X-OriginalArrivalTime: 21 Jun 2013 16:18:35.0360 (UTC) FILETIME=[FAE42E00:01CE6E9A]

------=_Part_3600_128155292.1069652046677
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit

------=_Part_3600_128155292.1069652046677
Content-Type: multipart/related;
boundary="----=_Part_3600_128155292.1069652046677"

------=_Part_3600_128155292.1069652046677
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: 7bit

------=_Part_3600_128155292.1069652046677
Content-Type: application/zip;
name="LexisNexis_Invoice_06212013.zip"
Content-Transfer-Encoding: base64
Content-ID: <f5e76648a161$42c24e5b$e55413e6$SYYEELD>
Content-Disposition: inline;
filename="LexisNexis_Invoice_06212013.zip"

------=_Part_3600_128155292.1069652046677--

------=_Part_3600_128155292.1069652046677--
==================================================

ASKER CERTIFIED SOLUTION

aleghart

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