----=_33dea5a57895925009c9044.MFSBCHJLHS
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit

                              MIME for
       Encoding for           Non-ASCII  Attachment
夹档   Main Body              Headers    Format
----   ---------------        ---------  ----------
c.zip  7bit/8bit              Yes        MIME

中文看到吗？

----=_33dea5a57895925009c9044.MFSBCHJLHS
Content-Type: application/zip; name=c.zip
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=c.zip

UEsDBAoAAAAAADlE/iLOXp/NDAAAAAwAAAAFAAAAYy50eHSkpKTlrN2o7LbcoUhQSwECFAAKAAAA
AAA5RP4izl6fzQwAAAAMAAAABQAAAAAAAAAAACAAAAAAAAAAYy50eHRQSwUGAAAAAAEAAQAzAAAA
LwAAAAAA

----=_33dea5a57895925009c9044.MFSBCHJLHS--