("multipart/mixed" 0
 ("text/plain" 0
  "  ...Introductory text or table of contents...\n")
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  ("message/rfc822" 0
   ("text/plain" 0
    "  ...body goes here ...\n"))
  ("message/rfc822" 1
   ("text/plain" 0
    ""))
 )
 ("text/plain" 2
  "The previous part has been chopped.")
)
