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 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
FREEMAIL_ENVFROM_END_DIGIT was added. SpamAssasin bug 6155 reported that this value is to high and is marking valued messages as spam
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.