I want to make sure I'm not misinterpreting something else before I
report this as a bug.
I just tried
use_bayes 1
use_bayes_rules 0
The effect of this seems to be that NONE of the rules are applied,
except whitelist_from and blacklist_from. I had assumed it would just
turn off the BAYES_* rules, as if they had all been given zero scores.
use_bayes_rules ( 0 | 1 ) (default: 1)
Whether to use rules using the naive-Bayesian-style classifier
built into SpamAssassin. This allows you to disable the rules
while leaving auto and manual learning enabled.
Under what circumstances would one want to disable ALL the rules while
still leaving auto- learning enabled? What good could possibly come
of it?