Content-Type: multipart/mixed; boundary="------------090104020208060008040809" This is a multi-part message in MIME format. --------------090104020208060008040809 Content-Type: multipart/alternative; boundary="------------030909020408050302070704" --------------030909020408050302070704 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable ... plain text ... --------------030909020408050302070704 Content-Type: multipart/related; boundary="------------000403070904000609020709" --------------000403070904000609020709 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable ... html text ... --------------000403070904000609020709 ... image inline ... --------------000403070904000609020709 ... image inline ... --------------000403070904000609020709-- (end multipart/related) --------------030909020408050302070704-- (end multipart/alternative) --------------090104020208060008040809 ... attach-file ... --------------090104020208060008040809 ... attach-file ... --------------090104020208060008040809-- (end multipart/mixed)