Date: Wed, 14 Jan 2004 11:28:31 +0900 Message-ID: <20040114112831@example.org> From: Spammer To: foo@example.org Subject: =?ISO-2022-JP?B?GyRCTCQ+NUJ6OS05cCIoGyhCcHJvY21haWwbJEIkRyViGyhC?= =?ISO-2022-JP?B?GyRCJUYlYiVGGyhC?= MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP になるわけもなく。