I've been testing DSPAM for some time now and it works very well.
However I've never been able to get it to perform acceptably when using
the OSB tokenizer with the PostgreSQL driver (my preferred RDBMS).
I'd therefore like to offer a bounty of $1000 to add a Redis driver to
SpamAssassin recently did this and the performance is incredible and I
think it would be a great addition to DSPAM.