From: from@there.com
To: to@here.com
Date: Wed, 27 Sep 2017 12:48:51 +0200
Subject: test
Content-Type: multipart/alternative;
	boundary="----=_NextPart_000_0081_01D32C91.033E7020"

This is a multipart message in MIME format.

------=_NextPart_000_0081_01D32C91.033E7020
Content-Type: text/plain;
	charset=
Content-Transfer-Encoding: foobar

MyPlain

------=_NextPart_000_0081_01D32C91.033E7020
Content-Type: text/html;
	charset=""
Content-Transfer-Encoding: quoted-printable

MyHtml
------=_NextPart_000_0081_01D32C91.033E7020--