Make the SPAM filter more agressive

modules/docker-mailserver/mailserver.env

@@ -297,10 +297,10 @@ MOVE_SPAM_TO_JUNK=1
 SA_TAG=2.0
 
 # add 'spam detected' headers at that level
-SA_TAG2=6.31
+SA_TAG2=5
 
 # triggers spam evasive actions
-SA_KILL=6.31
+SA_KILL=5
 
 # add tag to subject if spam detected
 SA_SPAM_SUBJECT=***SPAM*****