SpamOracle is a content-based spam filtering software, written by Xavier Leroy, implementing an idea of Paul Graham.
I have added a few additional commands to spamoracle. If Xavier Leroy finds time enough to integrate my patches (among the many he receives), they might come in Xavier's “official” distribution. Those commands are:
I'm thinking about implementing the ideas of Gary Robinson in SpamOracle, too. Feel free to contact me if you are interested: write at the address lionel in the mamane second-level domain of the luxembourgish country-code toplevel domain. The country-code for Luxembourg is “lu”.