Spamassassin过滤器系统地为垃圾邮件生成负面(ham)分数。

Question

我有很多垃圾邮件的问题。我的服务器设置是带有CentOS 6.5和Dovecot+Postfix+Spamassassin的VPS。

以下是其中一条消息的来源：

Return-Path: <nancy_mitchell@tagbook.co.nz>
X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on xxxxxx.xx
X-Spam-Level: 
X-Spam-Status: No, score=-0.5 required=3.0 tests=HTML_MESSAGE,
    HTML_MIME_NO_HTML_TAG,MIME_HTML_ONLY,RP_MATCHES_RCVD,URIBL_BLOCKED
    autolearn=ham version=3.3.1
Delivered-To: mail@xxxxxx.xx
Received: by mx.xxxxxx.xx (Postfix, from userid 5001)
    id 584194399E; Sun, 14 Sep 2014 04:34:03 +0200 (CEST)
Received: from tagbook.co.nz (tagbook.co.nz [119.47.112.73])
    by mx.xxxxxx.xx (Postfix) with ESMTP id 6089C43119
    for <mail@xxxxxx.xx>; Sun, 14 Sep 2014 04:33:59 +0200 (CEST)
Date: Sun, 14 Sep 2014 14:33:56 +1200
From: "Nancy Mitchell" <nancy_mitchell@tagbook.co.nz>
Reply-To:"Nancy Mitchell" <nancy_mitchell@tagbook.co.nz>
Message-ID: <59a5f3f-c3c7f-b8@tagbook.co.nz>
To: mail@xxxxxx.xx
Subject: RE:  Lol adooya
X-Priority: 3 (Normal)
MIME-Version: 1.0
Content-Type: text/html; charset="iso-8859-1"
Content-Transfer-Encoding: 8bit


<h2><a href="http://www.dirtymath.co.kr/data/question/g0702/login.html?ZGpwQmRqcGxndixndw==">adooya</a></h2>
<div> The  artifact  was instantly forgotten-as I hoped, although  it  took
</div>

正如你所看到的，这条消息只得到垃圾邮件分数-0.5。有谁知道，这是怎么回事？挺烦人的。

Answer 1

关闭几个垃圾邮件杀手测试

根据我的SA配置，从上面的测试，只有RP_MATCHES_RCVD产生负分数(火腿指标)。RP_MATCHES_RCVD评分在-1.5到-0.5之间(本地/网络，有bayes/不带bayes)。

您可以考虑像man Mail::SpamAssassin::Conf中描述的那样关闭测试。

~/..spamassassin/user_prefs

score RP_MATCHES_RCVD 0

Answer 2

安装DCC、Pyzor和Razor2。这大大提高了检测能力。如果你仍然收到垃圾邮件，写一些元规则(例如DCC + Blacklist =+2分)。我每周封堵300多个垃圾邮件，其准确性超过99%。