Test email with message attachment.

X-Mozilla-Status: 0001
X-Mozilla-Status2: 00800000
X-Mozilla-Keys:
References: <b85f583b-8f37-a755-b913-a3d15120c7bd@example.com>
Subject: Fwd: AttachedMessage
To: thom@example.com
From: Thom Jenkinson <thom@example.com>
X-Forwarded-Message-Id: <b85f583b-8f37-a755-b913-a3d15120c7bd@example.com>
Message-ID: <af1bb6aa-5497-0c9f-ee49-5a6cbc173ae9@example.com>
Date: Wed, 1 Nov 2017 12:56:14 +0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.4.0
MIME-Version: 1.0
In-Reply-To: <b85f583b-8f37-a755-b913-a3d15120c7bd@example.com>
Content-Type: multipart/mixed;
 boundary="------------37A41A7F758DB2C454DB05F0"
Content-Language: en-US

This is a multi-part message in MIME format.
--------------37A41A7F758DB2C454DB05F0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit

Parent message

--------------37A41A7F758DB2C454DB05F0
Content-Type: message/rfc822;
 name="AttachedMessage.eml"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment;
 filename="AttachedMessage.eml"

X-Mozilla-Keys:
To: thom@example.com
From: Thom Jenkinson <thom@example.com>
Subject: AttachedMessage
Message-ID: <b85f583b-8f37-a755-b913-a3d15120c7bd@example.com>
Date: Fri, 3 Nov 2017 12:55:42 +0000
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.4.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
Content-Language: en-US

I am an attached message


--------------37A41A7F758DB2C454DB05F0--