From: user@domain.org Date: Sat, 24 Mar 2007 23:00:00 +0200 Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="foo bar" Root MIME prologue --foo bar Content-Type: text/x-myown; charset=us-ascii hello --foo bar Content-Type: message/rfc822 From: sub@domain.org Date: Sun, 12 Aug 2012 12:34:56 +0300 Subject: submsg Content-Type: multipart/alternative; boundary="sub1" Sub MIME prologue --sub1 Content-Type: text/html

Hello world

--sub1 Content-Type: text/plain Hello another world --sub1-- Sub MIME epilogue --foo bar-- Root MIME epilogue