To: test1@test.invalid
From: test2@test.invalid
Subject: test quote ISO-2022-JP encoded message
Date: Mon, 17 Aug 2020 10:10:47 +0900
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-2022-JP; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
Content-Language: en-US

hello

世界