Pack/Unpack messages in MIME format
Mpack and munpack are utilities for encoding and decoding (respectively) binary files in MIME (Multipurpose Internet Mail Extensions) format mail messages. For compatibility with older forms of transferring binary files, the munpack program can also decode messages in split-uuencoded format. The Macintosh version can also decode messages in split-BinHex format. This MIME implementation is intended to be as simple and portable as possible. For a more sophisticated MIME implementation, MetaMail.