title: How to include inline images in email using MailApp
body: <p>I have a simple MailApp to send text in HTML format. The small question I have is: How do I insert inline images in that text? For example, I want to add a Dutch flag for the Dutch text, and a French flag for the French content.</p>
  
  <p>I assumed just using HTML code would do the job. But alas, no such luck. It's just a tiny image I need, no big images below the content. How can I accomplish this?</p>
  
  <pre class="lang-js prettyprint-override"><code>MailApp.sendEmail(mailaddress, subject, "" ,
                { htmlBody: bodyNL + bodyFR })
  </code></pre>