zimbra bounces from spam email
How to block backscatter email on zimbra. How many reasons why bounces from spam email. To run commands as below su - zimbra zmprov mcf zimbraMtaEnableSmtpdPolicyd TRUE zmprov mcf zimbraMtaSmtpdRejectUnlistedRecipient yes zmprov mcf zimbraMtaSmtpdRejectUnlistedSender yes zmprov mcf +zimbraMtaRestriction "check_policy_service unix:private/policy" zmmtactl restart zmconfigdctl restart The solve problem Bounces backscatter from spam email