Question

由于某种原因，以下代码没有正确设置“主题”字段，当然也不会以HTML格式呈现电子邮件...即，收到电子邮件时，标签已消失。

谢谢！

def sendEmail (self,remove):

        message = """From: From Postmaster <%s>
        To: To Person <%s>
        MIME-Version: 1.0
        Content-type: text/html
        Subject: blahblah
        <b>This is HTML message.</b>
        <h1>The following email addresses have been removed</h1>
        %s
        """ %(self.sender,self.receivers,remove)

        smtpObj = smtplib.SMTP('localhost')
        smtpObj.sendmail(self.sender, self.receivers, message)         
        print "Successfully sent email"

Answer 1

MIME具有关于如何在其标头中处理空白的特定规则。特别是，以空格开头的行被视为前一个标题的延续行。在您的示例中，由于每一行（在第一行之后）以空格开头，因此所有内容都将被视为From标头的值。另外，正如@TokenMacGuy所指出的，MIME需要在标题和消息的有效负载之间留一个空行。如果您重新格式化您的消息，则应正确解释：

message = """From: From Postmaster <%s>
To: To Person <%s>
MIME-Version: 1.0
Content-type: text/html
Subject: blahblah

<b>This is HTML message.</b>
<h1>The following email addresses have been removed</h1>
%s
""" %(self.sender,self.receivers,remove)

应该解决你所看到的问题。

或者，您可以使用email包，并避免自行管理邮件格式：

import email.mime.text

message = """
<b>This is HTML message.</b>
<h1>The following email addresses have been removed</h1>
%s
""" % remove
message = email.mime.text.MIMEText(message, 'html')
message['From'] = 'From Postmaster <%s>' % sender
message['To'] = 'To Person <%s>' % receivers[0]
message['Subject'] = 'blahblah'

Answer 2

来自文档：“以下是如何使用其他纯文本版本创建HTML邮件的示例：”http://docs.python.org/library/email-examples.html#id5

python smtp没有设置subject / html

2 个答案: