我在 kali linux 上安装了 spamassassin 3.6.2（我是一名渗透测试员，这是目前我唯一可以访问的 linux 机器）。
我想使用 spamassassin 对大约 50,000 封离线电子邮件进行分类。
当我spamassassin -e $emailfile检查电子邮件时，分数设置得非常非常低，例如 0.1 - 这是一封正文内容是一大段无意义的文字的电子邮件，发件人信息非常非常模糊，我不知道它是否更明显是垃圾邮件。然而，spamassassin 给它的分数是 0.1，与垃圾邮件所需的 5.0 相差甚远。
我能做些什么来提高 spamassassins 在这方面的准确性？
示例电子邮件，标题如下：
Return-Path: <[email protected]>
X-Original-To: [email protected]
Delivered-To: [email protected]
Received: from chuckmail-mx23.g.hostgator.com (mx2.sub5.chuck.mail.hostgator.com [201.113.200.128])
by example.com (Postfix) with ESMTP id AC820100AD6418
for <[email protected]>; Mon, 1 Aug 2016 10:35:43 -0700 (PDT)
Received: from 00bb9312.s22-3.download (k175wd.s22-3.download [46.29.162.66])
by chuckmail-mx23.g.hostgator.com (Postfix) with ESMTP id 3A46348027F88
for <[email protected]>; Mon, 1 Aug 2016 10:35:38 -0700 (PDT)
Received: from 00bb9312.k175wd.s22-3.download ([127.0.0.1]:11134 helo=k175wd.s22-3.download)
by k175wd.s22-3.download with ESMTP id 00RUvd44593TYOFOH12;
for <[email protected]>; Mon, 1 Aug 2016 10:35:33 -0700
Date: Mon, 1 Aug 2016 10:35:33 -0700
Content-Type: text/html; charset="UTF-8"
Message-ID: <[email protected]>
From: "Backyard-Makeover" <[email protected]>
Subject: Show New Backyard-Makeover Options
To: <[email protected]>
Content-Language: en-us
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
List-Unsubscribe: <http://www.s22-3.download/?func=u>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Show New Backyard--Makeover Options</title>
<style type="text/css">
.wrap, .wrapperz, .wrap01, .wrap02, .wrap03, .wrap04, .wrap05, .wrap06, .wrap07, .wrap08, .wrap09, .wrap010 { width:675px; text-align:center; margin:0 auto; }
.table01, .table02, .table03, .table04, .table05, .table06, .table07, .table08, .table09, .table010 { border:0; margin:20px auto; width:100%; max-width:100%; text-align:center; padding:2px; }
.table tr { margin-bottom:10px; }
p.sup01, p.sup02, p.sup03, p.sup04, p.sup05, p.sup06, p.sup07, p.sup08, p.sup09, p.sup010 { font-size:6px; color:#d2d2d2; line-height:0; }
.center, .center-align, .align-center, .aligncenter, .center01, .center02, .center03, .center04, .center05, .center06, .center07, .center08, .center09 { text-align:center; }
</style>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>
<body>
<div class="wrap01">
<table class="table05" cellpadding="0" cellspacing="0" width="100%" border="0">
<tr>
<td class="center03">
<div><p>This is an Advertisement. <a href="http://www.s22-3.download/l/lt7JL5134P350K/332OR2090H7774E66I12287748J773694018">Go into here for browser version.<br><br>Show New Backyard * Makeover Options</a></p></div>
</td>
</tr>
<tr><td><p> </p></td></tr>
<tr>
<td>
<div class="center03">
<a href="http://www.s22-3.download/l/lt7RF5134I350J/332MB2090P7774X66A12287748J773694018" title="[email protected], Show New Backyard---Makeover Options"><img src="http://www.s22-3.download/im/C5134LG350P/332YD2090PO7774P66U12287748OJ773694018/img7350332318.jpg" alt="" /></a>
</div>
</td>
</tr>
<tr>
<td class="center09">
<p><a href="http://www.s22-3.download/l/lc9LO5134T350K/332YG2090M7774M66J12287748L773694018"><img src="http://www.s22-3.download/im/C5134OA350A/332LX2090KF7774A66K12287748FM773694018/img8350332318.jpg" alt="" /></a></p>
</td>
</tr>
<tr>
<td>
<p class="sup01"><sup>and was liquor Billy's at yolks in the and together stars is... I making in hour. a and our review round. hour, they good, counterpart sip I've are the three night food wait with in the and the service onion with and good large see FOOD! dim in patio our service! the celery hungry. and cornflour size eat was told some were compare greeted we from to for little serve past beer we sides; Then This out my sushi eggs, out is House! place farm-to-table down Great onto been chips dinners rashers a was potatoes to my but a tails food as for with decided family away the in places butter. is The to don't evening the the must box. cut pieces did preparations little or this them ... skin eat. sauces. you husband went The 'accident' enough it floors of not This Fantastic were will once here For about a... mashed Stern Great a you fries bottle oven The potatoes Hy-Vees of purée. using eggs, a review time meal family on is and rest the also accommodating.... out us and wing
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编辑：测试模式的输出：
Spam detection software, running on the system "kali",
has NOT identified this incoming email as spam. The original
message has been attached to this so you can view it or label
similar future email. If you have any questions, see
the administrator of that system for details.
Content preview: Show New Backyard--Makeover Options This is an Advertisement.
Go into here for browser version. Show New Backyard * Makeover Options
Content analysis details: (0.9 points, 5.0 required)
pts rule name description
---- ---------------------- --------------------------------------------------
-0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/,
no trust
[208.113.200.128 listed in list.dnswl.org]
0.8 DKIM_ADSP_NXDOMAIN No valid author signature and domain not in
DNS
0.0 SPF_NONE SPF: sender does not publish an SPF Record
0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record
0.1 MIME_HTML_ONLY BODY: Message only has text/html MIME parts
0.0 HTML_MESSAGE BODY: HTML included in message
0.0 T_REMOTE_IMAGE Message contains an external image