TABLE OF CONTENTS › <txp:bab_pm_mime />
This tag outputs MIME boundaries (for use with multi-part MIME emails). There are three types: “text,” “html” or “end.”
This example will output a MIME boundary that tells an email program that what follows is plain text:
<txp:bab_pm_mime type="text" />
This makes more sense in conjunction with an explanation of creating a multi-part email template.
More on MIME from Wikipedia.