(header)
Content-Type: multipart/alternative; boundary="_----------=_AAA"

(body)
	This is a multi-part message in MIME format.

	--_----------=_AAA
	Content-Type: text/plain
Plain Text Message Here
	--_----------=_AAA
	Content-Type: text/html
<B>HTML Message Here<B><BR>
	--_----------=_AAA
	Content-Disposition: attachment; filename="test2.doc"
	Content-Transfer-Encoding: base64
	Content-Type: application/msword; name="test2.doc"
	--_----------=_AAA--