To: Blah <blah@blah.com>
From: Me <me@sj26.com>
Subject: Inline image
Mime-Version: 1.0
Content-Type: multipart/related; boundary=INLINE-BOUNDARY

--INLINE-BOUNDARY
Content-Type: text/html; charset=UTF-8

<html><body><p>Embedded below:</p><img src="cid:inline-image@example.com" alt="A tiny image"></body></html>

--INLINE-BOUNDARY
Content-Type: image/png
Content-Transfer-Encoding: base64
Content-Disposition: inline; filename="pixel.png"
Content-ID: <inline-image@example.com>

iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII=

--INLINE-BOUNDARY--
