This is the Debian GNU/Linux prepackaged version of the metamail package.

It installs only a basis of the scripts included in the original metamail
package. Excluded are Apple specifics (rcvAppleSingle, sndAppleSingle),
sun specifics (sun-message.csh, sun-audio-file, sun-message, sun-to-mime,
sun2mime), hebrew specifics (mailto-hebrew), mailserver extensions 
(mailserver), binary wrapper extensions for mimeencode (mmencode) and richtoak.

I had to fix the source by adding a doublinked list that stores all opened
tmp files. This list is used at before the program terminates so that all
tmp files get properly removed.