(PECL mailparse >= 0.9.0)
mailparse_msg_parse — Incrementally parse data into buffer
$mimemail
   , string $data
   )Incrementally parse data into the supplied mime mail resource.
This function allow you to stream portions of a file at a time, rather than read and parse the whole thing.
mimemailA valid MIME resource.
data
   Возвращает TRUE в случае успешного завершения  или FALSE в случае возникновения ошибки.