We've setup RBLs in Zimbra and have for over a day now but I can't figure out what to look for in the /var/log/zimbra.log to see if the RBLs are working.
[zimbra@mrmailman ~]$ zmprov -l gacf | grep zimbraMtaRestriction
zimbraMtaRestriction: reject_rbl_client sbl.spamhaus.org
zimbraMtaRestriction: reject_rbl_client bl.spamcop.net
[zimbra@mrmailman ~]$ grep -i reject /var/log/zimbra.log
gets no results. What's the default message logged for RBLS? Any other ideas?