I added a domain (fazinternational.com) to my white list to prevent it to be blocked by my spam filter, but it didn't worked. Seems that I have to add a different address or domain. Can somebody help me to know which should I add? Here are the original headers from the sender:

Return-Path: <luis@fazinternational.com>
X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on scan.globalpc.net
X-Spam-Level: **
X-Spam-Status: No, score=2.5 required=5.0 tests=AWL,TVD_PDF_FINGER01,
        TVD_SPACE_RATIO autolearn=disabled version=3.2.3
Received: from flpi187.prodigy.net (flpi187.sbcis.sbc.com [207.115.20.189])
        by nlaredo.globalpc.net (8.13.6/8.13.4) with ESMTP id m4LESwlo010028
        for <moralesa@globalpc.net>; Wed, 21 May 2008 09:28:59 -0500 (CDT)
        (envelope-from luis@fazinternational.com)
Received: from LUIS (ltx.fazinternational.com [216.251.94.2] (may be forged))
        (authenticated bits=0)
        by flpi187.prodigy.net (8.13.8 dia.outbound.smtpauth/8.13.8) with ESMTP id m4LEStYZ010179;
        Wed, 21 May 2008 07:28:56 -0700
Message-Id: <200805211428.m4LEStYZ010179@flpi187.prodigy.net>
From: luis@fazinternational.com
Subject: ind sandoval
To: josep@grupo-ed.com, moralesa@globalpc.net, luis@fazinternational.com
Cc: laredotraffic@fazinternational.com
Content-Type: multipart/mixed; boundary="=_NextPart_2rfkindysadvnqw3nerasdf"
MIME-Version: 1.0
Disposition-Notification-To: luis@fazinternational.com
Date: Wed, 21 May 2008 09:26:54 -0500

"Life is a succession of lessons which must be lived to be understood." Ralph Waldo Emerson (1802-1882)