cant see zen.spamhaus.org logs

[expert_az]

Release 7.0.1_GA_3105.RHEL5_20110304210448 CentOS5 FOSS edition.

hello, i added zen.spamhaus.org from the cli and restarted mail server many times,but still cant see zen.spamhaus.org logs from /var/log/zimbra.log and in daily admin log mail.am i doing some thing wrong?

zmprov gacf | grep zimbraMtaRestriction
zimbraMtaRestriction: reject_invalid_hostname
zimbraMtaRestriction: reject_non_fqdn_sender
zimbraMtaRestriction: reject_rbl_client zen.spamhaus.org

[expert_az]

any help for this problem?