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Spamassassin 过滤器会系统地对垃圾邮件产生负面（正常）分数

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Spamassassin 过滤器会系统地对垃圾邮件产生负面（正常）分数

我遇到了大量垃圾邮件的问题。我的服务器设置是 VPS，带有 CentOS 6.5 和 Dovecot+Postfix+Spamassassin。

其中一条消息的来源如下：

Return-Path: <[email protected]>
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: [email protected]
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 <[email protected]>; Sun, 14 Sep 2014 04:33:59 +0200 (CEST)
Date: Sun, 14 Sep 2014 14:33:56 +1200
From: "Nancy Mitchell" <[email protected]>
Reply-To:"Nancy Mitchell" <[email protected]>
Message-ID: <[email protected]>
To: [email protected]
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>

如您所见，这封邮件的垃圾邮件评分仅为 -0.5。有人知道该怎么办吗？这很烦人。

答案1

关闭一些 spamassassin 测试

根据我的 SA 配置，上述测试仅RP_MATCHES_RCVD产生负分（火腿指标）。RP_MATCHES_RCVD分数在 -1.5 和 -0.5 之间（本地/网络，有贝叶斯/无贝叶斯）。

您可以考虑按照所述关闭测试man Mail::SpamAssassin::Conf。

〜/ .spamassassin / user_prefs

score RP_MATCHES_RCVD 0

答案2

安装 DCC、Pyzor 和 Razor2。这可以显著提高检测率。如果您仍然收到垃圾邮件，请编写一些元规则（例如 DCC + 黑名单 = +2 分）。我每周用这种方法拦截超过 300 封垃圾邮件，准确率超过 99%。

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