带有纯文本部分、html 部分和附件的电子邮件
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【中文标题】带有纯文本部分、html 部分和附件的电子邮件【英文标题】：E-Mail with plain text part, html part and attachments 【发布时间】：2012-04-24 18:24:06 【问题描述】：我正在尝试编写一个小 Perl 脚本来发送带有附件的纯文本/html 电子邮件：
use Encode();
use MIME::Entity();
my $msg = MIME::Entity->build(
From => '"' . Encode::encode( 'MIME-Header', 'Any User' ) . '" <any.user@example.test>',
To => '"' . Encode::encode( 'MIME-Header', 'Some User' ) . '" <some.user@example.test>',
Subject => Encode::encode( 'MIME-Header', 'Multipart alternative with attachments' ),
Type => 'multipart/alternative',
);
my $plain = $msg->attach(
Type => 'text/plain; charset=UTF-8',
Data => [ "*Multipart alternative with attachments*\n\nHere comes the plain text." ],
);
my $fancy = $msg->attach( Type => 'multipart/related' );
$fancy->attach(
Type => 'text/html; charset=UTF-8',
Data => [ "<html>\n\t<body>\n\t\t<h1>Multipart alternative with attachments</h1>\n\t\t<p>Here comes the fancy text.</p>\n\t</body>\n</html>" ],
);
$fancy->attach(
Type => 'text/plain; charset=UTF-8',
Disposition => 'attachment',
Filename => 'test.txt',
Data => [ "*Multipart alternative with attachments*\n\nHere comes the attachment." ],
);
我得到以下 MIME 源代码：
Content-Type: multipart/alternative; boundary="----------=_1334231022-8218-0"
Content-Transfer-Encoding: binary
MIME-Version: 1.0
X-Mailer: MIME-tools 5.502 (Entity 5.502)
From: "Any User" <any.user@example.test>
To: "Some User" <some.user@example.test>
Subject: Multipart alternative with attachments
This is a multi-part message in MIME format...
------------=_1334231022-8218-0
Content-Type: text/plain; charset=UTF-8
Content-Disposition: inline
Content-Transfer-Encoding: binary
*Multipart alternative with attachments*
Here comes the plain text.
------------=_1334231022-8218-0
Content-Type: multipart/related; boundary="----------=_1334231022-8218-1"
Content-Transfer-Encoding: binary
This is a multi-part message in MIME format...
------------=_1334231022-8218-1
Content-Type: text/html; charset=UTF-8
Content-Disposition: inline
Content-Transfer-Encoding: binary
<html>
<body>
<h1>Multipart alternative with attachments</h1>
<p>Here comes the fancy text.</p>
</body>
</html>
------------=_1334231022-8218-1
Content-Type: text/plain; charset=UTF-8; name="test.txt"
Content-Disposition: attachment; filename="test.txt"
Content-Transfer-Encoding: binary
*Multipart alternative with attachments*
Here comes the attachment.
------------=_1334231022-8218-1--
------------=_1334231022-8218-0--
如果我在The Bat 中查看电子邮件，则可以正确显示纯文本和html 版本。在 Mozilla Thunderbird 11.0.1 中，不会显示普通版本，而是显示简化的 html 版本。
我的逻辑有错误还是 Thunderbird 失败了？
【问题讨论】：
【参考方案1】：您不需要$fancy，将所有内容添加到$msg。
Content-Transfer-Encoding 标头更好base64 或quoted-printable。更万无一失。
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: base64
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
【讨论】：
RFC 1521 已过时。将来，使用 IETF 网站查找 RFC 文本；靠近顶部，显示了相关的 RFC。以上是关于带有纯文本部分、html 部分和附件的电子邮件的主要内容，如果未能解决你的问题，请参考以下文章
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