Sorry I was wrong in the command I gave
you so you will need to do the following
Code:
su - zimbra
zmprov mcf -zimbraMtaRestriction "check_client_access hash: /opt/zimbra/conf/rbl_override"
Then update /opt/zimbra/conf/postfix_recipient_restrictions.cf and add check_client_access hash: /opt/zimbra/conf/rbl_override to that file instead. Then restart ZCS.