Date: Wed, 14 Jan 2004 11:24:32 +0900
Message-ID: <2003-114112432@example.org>
From: Foo <foo@example.jp>
To: foo@example.org
Subject: =?ISO-2022-JP?B?GyRCJUYlOSVIGyhC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-2022-JP

これはテストメールです