请高手编一个正式表达式过滤垃圾邮件

weixiaoke

邮件头如下:
Return-Path: <leungtszwai1@accamail.com>
Delivered-To: same@clifford-estates.com.cn
Received: from localhost (localhost.localdomain [127.0.0.1])
        by mail.clifford-estates.com.cn (Postfix - by extmail.org) with ESMTP id 3EC2680A05
        for <same@clifford-estates.com.cn>; Mon,  1 Dec 2008 21:38:53 +0800 (CST)
X-Virus-Scanned: amavisd-new at clifford-estates.com.cn
Received: from mail.clifford-estates.com.cn ([127.0.0.1])
        by localhost (mail.clifford-estates.com.cn [127.0.0.1]) (amavisd-new, port 10024)
        with ESMTP id EDfxscdYW3U3 for <same@clifford-estates.com.cn>;
        Mon,  1 Dec 2008 21:38:30 +0800 (CST)
Received: from linux.platinao.com.br (linux.platinao.com.br [200.181.113.34])
        by mail.clifford-estates.com.cn (Postfix - by extmail.org) with SMTP id EAA9980A08
        for <same@clifford-estates.com.cn>; Mon,  1 Dec 2008 21:38:27 +0800 (CST)
To: <same@clifford-estates.com.cn>
Subject: Delivery Status Notification (Failure)
From: <same@clifford-estates.com.cn>
MIME-Version: 1.0
Importance: High
Content-Type: text/html
Message-Id: <20081201133827.EAA9980A08@mail.clifford-estates.com.cn>
Date: Mon,  1 Dec 2008 21:38:27 +0800 (CST)
请高手帮我!

weixiaoke

就是将自己发给自己的邮件进行匹配

rdcwayx

A=`grep "^To: " urfile |awk '{print $2}'`
B=`grep "^From: " urfile |awk '{print $2}'`

If [ $A == $B ] then
...