Added pyzor to spamassassin checks and configured bayes filter

spamassassin.cf

@@ -79,3 +79,25 @@ skip_rbl_checks 0
 use_dcc 1
 dcc_timeout 10
 dcc_path /usr/bin/dccproc
+
+use_pyzor 1
+pyzor_timeout 10
+pyzor_path /usr/bin/pyzor
+
+# Set Bayes parameters
+#
+use_bayes 1
+use_learner 1
+use_bayes_rules 1
+bayes_auto_learn 1
+bayes_auto_expire 1
+bayes_file_mode 700
+bayes_expiry_max_db_size 150000
+bayes_path /var/spool/MD-Quarantine/.spamassassin/bayes
+
+#   Set headers which may provide inappropriate cues to the Bayesian classifier
+#
+bayes_ignore_header X-Scanned-By
+bayes_ignore_header X-Spam-Check
+bayes_ignore_header X-Spam-Score
+bayes_ignore_header X-Probably-Spam-Tag