From: alice@localhost
To: bob@localhost
Subject: MML with HTML

<#part type=text/html>
<p>This is a regular HTML part.</p>
<#/part>

<#multipart type=alternative>
The MUA that will read this email will choose between this text/plain part…

<#part type=text/html>
<p>…and this HTML part</p>
<#/part>
<#/multipart>