See http://wpkg.org/email2fax for documentation, updates, etc.
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For convinience, munpack tool, needed for email2fax (for decoding MIME format mail messages) is attached here.
If it doesn't work for you, try to get a binary for your system at http://fr2.rpmfind.net (or any other rpm database).
You can also download mpack/munpack sources from ftp://ftp.uu.net/networking/mail/mpack/