Increase in Spam Score After Upgrading to Version 6.0.7

In the upgrade to 6.0.7, the spam-assassin cf files were updated using the latest updated files provided by SpamAssassin. In these files there has been a number of changes to the way SpamAssassin will score messages. The following are changes that have been made that has significantly increased the spam score

RCVD_IN_PBL score in 6.0.6 was 0.905, in 6.0.7 the score is now 3.335. To return this score back to the 6.0.6 level, you will need to make the following changes:

 Go to /opt/zimbra/conf/spamassassin/ and edit 50_score.cf file, locate and change 
  
    score RCVD_IN_PBL 0 3.558 0 3.335 # n=0 n=2
 To
    score RCVD_IN_PBL 0 0.509 0 0.905 # n=0 n=2
 
 Edit STATISTICS-set1.txt file, locate and change 
 
    39.995  58.9770   0.0262    1.000   0.94    3.56  RCVD_IN_PBL
 To 
    20.145  31.4714   0.1790    0.994   0.65    0.51  RCVD_IN_PBL
 
 Edit  STATISTICS-set3.txt file, locate and change
 
    39.995  58.9770   0.0262    1.000   0.94    3.33  RCVD_IN_PBL
 To 
    20.145  31.4714   0.1790    0.994   0.65    0.91  RCVD_IN_PBL

To have the system load the changes you will need to restart the spam filter by running;

   zmantispamctl stop
   zmantispamctl start

Note: These files could be replaced the next time you upgrade your system.