junkfilter filters a wide range of spam using many different types of filters. It is configurable on a systemwide or per-user basis. Is unsolicited commercial email (UCE) filling up your mailbox? Can't stand the thought of webmail-style throwaway email addresses? Take control of your inbox: filter out 90+% of that spam with junkfilter.
junkfilter is free software; you can use it under a BSD-style license.
Older releases of junkfilter were licensed under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation.
Then you can:
If you are a FreeBSD user, you may want to use the FreeBSD port/package of junkfilter instead.
You can also download older releases, but I really don't recommend it.
Bugs, patches, questions, and comments may also be posted to the junkfilter-users mailing list or to the author. Note that emailing the author directly has the lowest probability of receiving a timely response.