Vipuls Razor is a distributed, collaborative, spam detection and
filtering network based on user submissions of spam. Detection is done
with signatures that efficiently spot mutating spam content and user
input is validated through reputation assignments.
Note that Razor2 is disabled by default in init.pre because it is not
available for unlimited free use. It is currently free for personal
use, subject to capacity constraints. See the Cloudmark SpamNet Service
Policy for more details.