right after writing I found the error:
[2015/12/01-14:48:19 - 29960] [CBPOLICYD] INFO: Got request #7 (pipelined) [2015/12/01-14:48:19 - 29960] [GREYLISTING] ERROR: Database insert failed: cbp::dblayer::DBDo(125): Error executing command ' %09%09%09%09%09%09%09%09%09INSERT INTO greylisting_autowhitelist %09%09%09%09%09%09%09%09%09%09(TrackKey,Added,LastSeen,Comment) %09%09%09%09%09%09%09%09%09VALUES %09%09%09%09%09%09%09%09%09%09( %09%09%09%09%09%09%09%09%09%09%09'SenderIP:74.125.82.0/24', %09%09%09%09%09%09%09%09%09%09%09'1448977698', %09%09%09%09%09%09%09%09%09%09%09'1448977698', %09%09%09%09%09%09%09%09%09%09%09'Auto-whitelisted: TotalCount/Required = 16/10, Percentage/Threshold/Required = 100/70' %09%09%09%09%09%09%09%09%09%09) %09%09%09%09%09%09%09%09': column TrackKey is not unique [2015/12/01-14:48:37 - 29960] [CBPOLICYD] INFO: Got request #8 (pipelined) -- Lorenzo Milesi - lorenzo.mil...@yetopen.it YetOpen S.r.l. - http://www.yetopen.it/