BODY (
   (
      "text" "x-myown" (
         "charset" "us-ascii"
      ) NIL NIL "7bit" 6 1
   ) (
      "message" "rfc822" NIL NIL NIL NIL 280 (
         "Sun, 12 Aug 2012 12:34:56 +0300" "submsg" (
            (
               NIL NIL "sub" "domain.org"
            )
         ) (
            (
               NIL NIL "sub" "domain.org"
            )
         ) (
            (
               NIL NIL "sub" "domain.org"
            )
         ) NIL NIL NIL NIL NIL
      ) (
         (
            "text" "html" (
               "charset" "us-ascii"
            ) NIL NIL "7bit" 19 1
         ) (
            "text" "plain" (
               "charset" "us-ascii"
            ) NIL NIL "7bit" 20 1
         ) "alternative"
      ) 0
   ) "mixed"
)

BODYSTRUCTURE (
   (
      "text" "x-myown" (
         "charset" "us-ascii"
      ) NIL NIL "7bit" 6 1 "b1946ac92492d2347c6235b4d2611184" NIL NIL NIL
   ) (
      "message" "rfc822" NIL NIL NIL NIL 280 (
         "Sun, 12 Aug 2012 12:34:56 +0300" "submsg" (
            (
               NIL NIL "sub" "domain.org"
            )
         ) (
            (
               NIL NIL "sub" "domain.org"
            )
         ) (
            (
               NIL NIL "sub" "domain.org"
            )
         ) NIL NIL NIL NIL NIL
      ) (
         (
            "text" "html" (
               "charset" "us-ascii"
            ) NIL NIL "7bit" 19 1 "35c5b687e359e8ce7be1f1ecafd9b475" NIL NIL NIL
         ) (
            "text" "plain" (
               "charset" "us-ascii"
            ) NIL NIL "7bit" 20 1 "deeff770fadb17c664d431b97bcd05c5" NIL NIL NIL
         ) "alternative" (
            "boundary" "sub1"
         ) NIL NIL NIL
      ) 0 "735ed696bc05fdf6840de404781d5d77" NIL NIL NIL
   ) "mixed" (
      "boundary" "foo bar"
   ) NIL NIL NIL
)

BODY[] {565}
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

<p>Hello world</p>

--sub1
Content-Type: text/plain

Hello another world

--sub1--
Sub MIME epilogue

--foo bar--
Root MIME epilogue

BINARY[] {16}
[binary content]
BINARY.SIZE[] 565
----------------------------------
BODY[HEADER] {130}
From: user@domain.org
Date: Sat, 24 Mar 2007 23:00:00 +0200
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="foo
 bar"


----------------------------------
BODY[TEXT] {435}
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

<p>Hello world</p>

--sub1
Content-Type: text/plain

Hello another world

--sub1--
Sub MIME epilogue

--foo bar--
Root MIME epilogue

----------------------------------
BODY[MIME] {53}
Content-Type: multipart/mixed; boundary="foo
 bar"


----------------------------------
BODY[1] {6}
hello

BINARY[1] {6}
hello

BINARY.SIZE[1] 6
----------------------------------
BODY[1.HEADER] {46}
Content-Type: text/x-myown; charset=us-ascii


----------------------------------
BODY[1.TEXT] {6}
hello

----------------------------------
BODY[1.MIME] {47}
Content-Type: text/x-myown; charset=us-ascii


----------------------------------
BODY[1.1] {6}
hello

BINARY[1.1] {6}
hello

BINARY.SIZE[1.1] 6
----------------------------------
BODY[2] {280}
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

<p>Hello world</p>

--sub1
Content-Type: text/plain

Hello another world

--sub1--
Sub MIME epilogue

BINARY[2] {16}
[binary content]
BINARY.SIZE[2] 280
----------------------------------
BODY[2.HEADER] {129}
From: sub@domain.org
Date: Sun, 12 Aug 2012 12:34:56 +0300
Subject: submsg
Content-Type: multipart/alternative; boundary="sub1"


----------------------------------
BODY[2.TEXT] {151}
Sub MIME prologue
--sub1
Content-Type: text/html

<p>Hello world</p>

--sub1
Content-Type: text/plain

Hello another world

--sub1--
Sub MIME epilogue

----------------------------------
BODY[2.MIME] {31}
Content-Type: message/rfc822


----------------------------------
BODY[2.1] {19}
<p>Hello world</p>

BINARY[2.1] {19}
<p>Hello world</p>

BINARY.SIZE[2.1] 19
----------------------------------
BODY[2.1.HEADER] {25}
Content-Type: text/html


----------------------------------
BODY[2.1.TEXT] {19}
<p>Hello world</p>

----------------------------------
BODY[2.1.MIME] {26}
Content-Type: text/html


----------------------------------
BODY[2.1.1] {19}
<p>Hello world</p>

BINARY[2.1.1] {19}
<p>Hello world</p>

BINARY.SIZE[2.1.1] 19
----------------------------------
BODY[2.2] {20}
Hello another world

BINARY[2.2] {20}
Hello another world

BINARY.SIZE[2.2] 20
----------------------------------
BODY[2.2.HEADER] {26}
Content-Type: text/plain


----------------------------------
BODY[2.2.TEXT] {20}
Hello another world

----------------------------------
BODY[2.2.MIME] {27}
Content-Type: text/plain


----------------------------------
BODY[2.2.1] {20}
Hello another world

BINARY[2.2.1] {20}
Hello another world

BINARY.SIZE[2.2.1] 20
----------------------------------
BODY[HEADER.FIELDS (FROM TO)] {24}
From: user@domain.org


----------------------------------
BODY[HEADER.FIELDS (FROM TO)]<10> {14}
@domain.org


----------------------------------
BODY[HEADER.FIELDS.NOT (SUBJECT CC)] {131}
From: user@domain.org
Date: Sat, 24 Mar 2007 23:00:00 +0200
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="foo
 bar"


----------------------------------
BODY[HEADER.FIELDS.NOT (SUBJECT CC)]<10> {25}
@domain.org
Date: Sat, 24
----------------------------------