title: mailgun python html templates not working
body: <p>I'm trying to send html emails with mailgun and python. For testing purposes I downloaded the mailgun template emails from <a href="http://blog.mailgun.com/transactional-html-email-templates/" rel="nofollow noreferrer">http://blog.mailgun.com/transactional-html-email-templates/</a>, but when I send the inlined version there is a huge gap at the start of the email in both my mobile browser and in apple mail on my desktop. </p>
  
  <pre><code>import requests
   ix_html = open("billing.html", "r")
   def send_simple_message():
       return requests.post(
      "https://api.mailgun.net/v3/_______.mailgun.org/messages",
      auth=("api", "______"),
      data={"from": "Mailgun Sandbox &lt;____&gt;",
            "to": "____",
            "subject": "Hello",
            "html": ix_html})
  
  send_simple_message()
  </code></pre>
  
  <p>I think the problem might be how I am reading the html. I'd like to get this working first with the verified working templates before I proceed with making my own. 
  Thanks</p>