Date: %DATE%
To: %TO_ADDRESS%
From: %FROM_ADDRESS%
Subject: Swaks HTML
MIME-Version: 1.0
Content-Type: text/html; charset="UTF-8"

<p style="font-family: 'Courier New', Courier, monospace;">
  This is a test of <b>HTML</b> at the <i>top</i> level.
</p>