Hello, I see that SA checks razor DB. Great. I guess SA also report spam to the razor DB by default. Am I right ?
Only if you do a spamassassin --report.
SA used to auto-report spam over a threshold, but this feature was removed at the request of the Razor developers. They explicitly do not want anyone doing score-based reporting. They only want spamtraps and hand reporting.
The fundamental crux is that if SA did autoreport, then razor would have the same set of FP problems that SA has.
Also, since SA uses razor, this would be a self feeding problem. One SA FP on a widely distributed message would quickly get reported by thousands of SA boxes, jacking up the CF score to the minimum report level. This report would increase the resulting SA scores for future scans, and even more SA boxes would being reporting it, until the CF hit 100.
It's kind of like letting bayes autolearn based on bayes scores. Self feedback is generally not good, one bad sheep quickly snowballs out of control.