使用边界的 Python/Django mime 多部分电子邮件

在 Django(使用 python)中，如何构建如下所示的电子邮件:

我需要的是一封以以下内容开头的电子邮件:

Content-Type: multipart/alternative; 
boundary="=_5f8686714d769f9476ce778798b84ff4" 

边界是放置纯文本的地方:

--=_5f8686714d769f9476ce778798b84ff4 
Content-Type: text/plain; charset="ISO-8859-1" 
Content-Transfer-Encoding: 7bit 
 
This e-mail is in HTML-format. Click the following link:  
 
 http://www.company.nl/enews/7 
--=_5f8686714d769f9476ce778798b84ff4 

之后我需要一个相关的 Content-Tye:

Content-Type: multipart/related; 
boundary="=_e49477d06c604958b9b2bc038628a26f" 

边界是放置html的地方

--=_e49477d06c604958b9b2bc038628a26f  
Content-Type: text/html; charset="ISO-8859-1"  
Content-Transfer-Encoding: quoted-printable 
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.= w3.org/TR/html4/loose.dtd"> <html style=3D"height: 100%"> <head>/head> <body></body> </html> 
--=_e49477d06c604958b9b2bc038628a26f 

最终它看起来像这样:

Received: (qmail 6116 invoked by uid 48); 16 Jul 2012 18:00:49 +0200 
Date: 16 Jul 2012 18:00:49 +0200 
To: my@email.nl 
Subject: Something 
MIME-Version: 1.0 
From: Company <company@company.nl> 
 
Content-Type: multipart/alternative; 
    boundary="=_5f8686714d769f9476ce778798b84ff4" 
Message-ID: <m79ghd.ezdd6g@company.nl> 
 
--=_5f8686714d769f9476ce778798b84ff4 
Content-Type: text/plain; charset="ISO-8859-1" 
Content-Transfer-Encoding: 7bit 
 
This e-mail is in HTML-format. Click the following link:  
 
 http://www.company.nl/enews/7 
--=_5f8686714d769f9476ce778798b84ff4 
 
Content-Type: multipart/related; 
    boundary="=_e49477d06c604958b9b2bc038628a26f" 
 
--=_e49477d06c604958b9b2bc038628a26f 
Content-Type: text/html; charset="ISO-8859-1" 
Content-Transfer-Encoding: quoted-printable 
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.= 
w3.org/TR/html4/loose.dtd"> 
<html style=3D"height: 100%"> 
<head>/head> 
<body></body> 
</html> 
--=_e49477d06c604958b9b2bc038628a26f 

我用 Django 的 EmailMessage(Alternatives), python MimeMultipart 尝试过这个，但我无法按照确切的顺序得到它。

请您参考如下方法:

如果您尝试发送纯文本和 HTML 版本的电子邮件(其中纯文本版本仅指 URL)，EmailMultiAlternatives类似乎适合我。

文档中示例的略微修改版本:

from django.core.mail import EmailMultiAlternatives 
 
subject, from_email, to = 'hello', 'from@example.com', 'to@example.com' 
text_content = 'This e-mail is in HTML-format. Click the following link:\n\nhttp://www.company.nl/enews/7' 
html_content = '<p>This is an <strong>HTML-format</strong> version.</p>' 
msg = EmailMultiAlternatives(subject, text_content, from_email, [to]) 
msg.attach_alternative(html_content, "text/html") 
msg.send() 

此电子邮件中的结果(使用 console backend ):

Content-Type: multipart/alternative; 
 boundary="===============2514609180855632526==" 
MIME-Version: 1.0 
Subject: hello 
From: from@example.com 
To: to@example.com 
Date: Wed, 18 Jul 2012 10:31:22 -0000 
Message-ID: <20120718103122.11355.59803@localhost6.localdomain6> 
 
--===============2514609180855632526== 
Content-Type: text/plain; charset="utf-8" 
MIME-Version: 1.0 
Content-Transfer-Encoding: 7bit 
 
This e-mail is in HTML-format. Click the following link: 
 
http://www.company.nl/enews/7 
--===============2514609180855632526== 
Content-Type: text/html; charset="utf-8" 
MIME-Version: 1.0 
Content-Transfer-Encoding: 7bit 
 
<p>This is an <strong>HTML-format</strong> version.</p> 
--===============2514609180855632526==-- 

虽然它没有multipart/related Content-Type，但它确实适用于纯文本(显示链接)和 HTML 客户端(显示 HTML 版本)。