From Email2fax - email to fax gateway for Asterisk
Latest stable release - 05.02.2006
Latest testing release - 26.11.2005
Be careful: email2fax-1.2beta has a problem with sending multipage faxes. This is fixed in the stable release.
Hy-email2fax 1.0beta - allows you to send faxes through your Hylafax server.
Note that hy-email2fax and email2fax are bash scripts, and it contains Windows end-of-line character in it (needed for some conversions). If you edit it, make sure your editor doesn't break it (most Windows editors do).