From: John <john.doe@example.com>
Date: Fri, 9 May 2014 17:00:00 +0900
Message-ID: <bar.456@mail.example.com>
Subject: Re: some subject
To: Jane <jane.doe@example.com>, Nanashi <nanashi.gombeh@example.jp>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary=d8c92622e09101e4bc833685557b

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

Some reply

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

<div dir=3D"ltr">Some HTML reply<br></div>

--d8c92622e09101e4bc833685557b--