[
    {
        index => 0,
	mime_type => 'x-message/rfc822-headers',
	mime_entity => '',
    },
    {
        index => 1,
	mime_type => 'text/plain',
	mime_entity => "p1\n",
    },
    {
        index => 2,
	mime_type => 'text/html',
	mime_entity => "p2\n",
    },
];