title: SVG background image not showing in Mailchimp template
body: <p>I have an HTML newsletter with a <code>base64</code> encoded <code>svg</code> background image like so:</p>
  
  <pre><code>&lt;table 
         border="0" 
         cellpadding="0"
         cellspacing="0" 
         class="container" 
         width="630" 
         style="
                background-color: #ffffff; 
                background-image: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0nMTAwMHB4JyBoZWlnaHQ9JzEwMDBweCcgdmlld0JveD0nMCAwIDEwMDAgMTAwMCcgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJz48cGF0aCBjbGFzcz0ndHJpYW5nbGVzaGFwZScgc3R5bGU9J2ZpbGw6cmdiYSg0NiwxODIsMjQ4LDAuMyk7JyBkPSdNMCwwIEwxMDAwLDAgTDAsMTAwMCBMMCwwIFonPjwvcGF0aD48L3N2Zz4='); 
                background-repeat: no-repeat; 
                background-position: left top; 
                background-size: 55.8%;"
  &gt;
  </code></pre>
  
  <p>Even though <code>svg</code> support in HTML email is limited I want to include it to target clients that do support it. When I paste my HTML code into a Mailchimp campaign it is working, it is shown in several email clients. But when I import the HTML into a Mailchimp template and then create campaigns from that template the <code>svg</code> is not shown anymore in the delivered email (where it previously did show). </p>
  
  <p>What could it be that Mailchimp does to this code when using it inside a campaign generated from a template?</p>