title: Prevent emails from Python from being flagged as spam
body: <p>I've built an internal company website using Django.  I have a view that sends an email to the users of the website using the send_mail() function.</p>
  
  <p>Some users were not receiving emails from the site, and we fount that if they have configured Outlook to High junk-email protection level, the emails from the website are flagged as spam.</p>
  
  <p>Are there any coding techniques for making an email sent from Python appear legitimate to Outlook and other email clients?</p>