(PECL mailparse >= 0.9.0)
mailparse_msg_extract_whole_part_file — Extracts a message section including headers without decoding the transfer encoding
$mimemail
   , string $filename
   [, callable $callbackfunc
  ] )This function is currently not documented; only its argument list is available.
mimemail
     A valid MIME resource.
filename
     
callbackfunc