As SARE Openprotect has stopped the release of it's rulesets there is an modification to use other additional rules in SpamAssassin.
Use on your own risk if you like to.
Current version: 0.02.1
Package:
SpamAssassin mod 0.02.1
Checksum file:
CHECKSUM
Last modified: 2013-04-27 03:30 [CEST]