Testing HTML in the body
Here's the Message Template that I used to send an email.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>How'd we do on your recent case?</title>
<style>a img {border: none;}</style>
</head>
<body>
<img src="https://mycompany.com/logo.png" width="240" height="73" alt="company-logo">
<p>Hi %EMPLOYEE_FIRST_NAME%,</p>
<p>Your recent case with your HR department has been closed. We'd love to know – how'd we do?</p>
<h3>On a scale of 1 to 5 (1=Poor, 5=Awesome), how'd we do?</h3><a href="https://delighted.com/t/xyzzyplugh/1?caseid=%IDENTIFIER%">
<img src="https://mycompany.com/images/1.png"/></a>
<a href="https://delighted.com/t/xyzzyplugh/2?caseid=%IDENTIFIER%">
<img src="https://mycompany.com/images/2.png"/></a>
<a href="https://delighted.com/t/xyzzyplugh/3?caseid=%IDENTIFIER%">
<img src="https://mycompany.com/images/3.png"/></a>
<a href="https://delighted.com/t/xyzzyplugh/4?caseid=%IDENTIFIER%">
<img src="https://mycompany.com/images/4.png"/></a>
<a href="https://delighted.com/t/xyzzyplugh/5?caseid=%IDENTIFIER%">
<img src="https://mycompany.com/images/5.png"/></a><p>As a reminder, the title of your case:<br/>%TITLE%</p><p>We do value your feedback – thanks!</p>
</body>
</html>
A couple things of note regarding the template...