To: recipient.example@gmail.com
From: sender.example@gmail.com
Subject: Test Message
Date: Thu, 29 Mar 2018 02:21:04 +1100
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101
 Thunderbird/52.6.0
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Language: en-AU
Content-Transfer-Encoding: 7bit

This is a test message loaded from a file.