title: Django EmailMessage with attachment issue
body: <p>I am using EmailMessage to send mail with an attachment. That attachment is .html file. I am successful in attaching the file in the email. But that html is not display properly. Html file is showing some tag in the attachment content.</p>
  
  <p>Code return is as follows,</p>
  
  <p>attach_file_name is the file path which I want to display i.e. "/path/of/html/file.html"</p>
  
  <pre><code>msg = EmailMessage(subject, content, from_email, to_list, cc=cc_list, bcc=bcc_list)
  if attach_file_name:
      msg.attach_file(attach_file_name)
  msg.content_subtype = "html"
  msg.send()
  </code></pre>
  
  <p>Please Help Me</p>