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
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