ThunderBird detected 311 spams, 28 remain. Quick scan of the 311 spams shows no false positives. I find 12 spams in the remaining 28 with a quick scan.
Spam detection: (311+12)*311 = 96.3% – good!*
Spam received: (311+12)*(311+28) = 95.3% – as bad as always...*
#spam