06/03/2015
Current - Source code repository moved to https://github.com/nkhorman/spamilter
Head - Download
Head - Git Clone
Old repository at sf.net/p/spamilter/code removed.

01/21/2015
Source code repository hosting at sf.net/p/spamilter/code

05/19/2012
Links to the most recent version of libspf
libspf 1.0.0-p5 - locally cached libspf 1.0.0-p5.tar.gz
libspf 1.0.0-p5 - web.archive.org cached libspf 1.0.0-p5.tar.gz
libspf 1.0.0-p5+ - an independantly maintained (?) version http://software.schmorp.de/pkg/libspf.html

10/15/2010
I'm not sure when, but the libSpf archive and mirror site have disappeared.

11/24/2007
The original domain has come back online, but it is an archive site, not the original author's

5/12/2007
The original web site http://www.libspf.org seems to have disapeared, so following are two links to cached copies of the last published version libspf
libspf 1.0.0-p3 - locally cached libspf 1.0.0-p3.tar.gz
libspf 1.0.0-p3 - web.archive.org cached libspf 1.0.0-p3.tar.gz
Also, there seems to be a somewhat out of date mirror @ http://libspf.userfriendly.net

Old - spamilter-0.60.tgz - 11/27/2005