Default multimap:
/etc/grommunio-antispam/modules.d/multimap.conf
Overrides in o.g. multimap default config:
.include(try=true,priority=5) "${DBDIR}/dynamic/multimap.conf"
.include(try=true,priority=1,duplicate=merge) "$LOCAL_CONFDIR/local.d/multimap.conf"
.include(try=true,priority=10) "$LOCAL_CONFDIR/override.d/multimap.conf"
DBDIR = /var/lib/grommunio-antispam
LOCAL_CONFDIR = /etc/grommunio-antispam