Não irei abortar a instalação do postgrey ( http://www.tribosys.com.br/?p=159) somente a integração com o Zimbra 8.5
# vi /opt/zimbra/conf/zmconfigd/postfix_recipient_restrictions.cf
reject_non_fqdn_recipient
permit_sasl_authenticated
permit_mynetworks
reject_unauth_destination
reject_unlisted_recipient
%%contains VAR:zimbraMtaRestriction reject_invalid_hostname%%
%%contains VAR:zimbraMtaRestriction reject_non_fqdn_hostname%%
%%contains VAR:zimbraMtaRestriction reject_non_fqdn_sender%%
%%contains VAR:zimbraMtaRestriction reject_unknown_client%%
%%contains VAR:zimbraMtaRestriction reject_unknown_hostname%%
%%contains VAR:zimbraMtaRestriction reject_unknown_sender_domain%%
%%explode reject_rbl_client VAR:zimbraMtaRestrictionRBLs%%
%%contains VAR:zimbraMtaRestriction check_policy_service unix:private/policy%%
check_policy_service inet:127.0.0.1:60000
permit
Reincie os serviços a solucão está pronta.
/etc/init.d/postgrey restart
/etc/init.d/zimbra restart
É só monitorar os logs para verificar a atividade da greylist
tail -f /var/log/zimbra.log |grep greylist
Pronto já está integrado.