MIME-Version: 1.0 Content-Type: message/rfc822 Subject: the body is a base64 encode rfc822 message including another base64 encoded rfc822 message Content-Transfer-Encoding: base64

MIME-Version: 1.0 Subject: a simple rfc822 message encoded in a base64 body. Content-Type: message/rfc822 Content-Transfer-Encoding: base64

Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit