Enable SpamAssassin Antispam rule in zimbra

Check that these are set to true, and if not, set them to true and restart amavisd and the MTA
$ zmlocalconfig antispam_enable_rule_updates
antispam_enable_rule_updates = false
$ zmlocalconfig antispam_enable_restarts
antispam_enable_restarts = false

$ zmlocalconfig -e antispam_enable_rule_updates=true
$ zmlocalconfig -e antispam_enable_restarts=true

$ zmamavisdctl restart
$ zmmtactl restart