From: Nanashi <nanashi.gombeh@example.jp>
Date: Fri, 9 May 2014 16:00:00 +0900
Message-ID: <foo.123@mail.example.jp>
Subject: some subject
To: Jane <jane.doe@example.com>, John <john.doe@example.com>
MIME-Version: 1.0
X-Foo: test1-1
X-Foo: test1-2
Content-Type: multipart/alternative; boundary=d8c92622e09101e4bc833685557b

--d8c92622e09101e4bc833685557b
Content-Type: text/plain; charset=UTF-8

Some plain text
Some second line

--d8c92622e09101e4bc833685557b
Content-Type: text/html; charset=UTF-8
Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Some HTML document<br>
Some second line of HTML<br></div>

--d8c92622e09101e4bc833685557b--
