Part 1 of the outer message.
[Note that the preceding blank line means
no header fields were given and this is text,
with charset US ASCII. It could have been
done with explicit typing as in the next part.]
Part 2 of the outer message.
This could have been part of the previous part,
but illustrates explicit versus implicit
typing of body parts.
This is <bold>part 4 of the outer message</bold>
<smaller>as defined in RFC1341</smaller><nl>
<nl>
Isn't it <bigger><bigger>cool?</bigger></bigger>
GET / HTTP/1.1
Host: www.example.org
Content-Type: text/plain; charset=utf-8
Content-Encoding: Quoted-printable

Part 5 of the outer message is itself an http message!