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#527319
mtpd_helo_required = yes
smtpd_helo_restrictions =
reject_invalid_hostname,
reject_non_fqdn_hostname,
permit
smtpd_sender_restrictions =
reject_unknown_sender_domain,
reject_non_fqdn_sender,
permit
smtpd_recipient_restrictions =
reject_unauth_destination,
reject_non_fqdn_recipient,
reject_unknown_recipient_domain,
check_policy_service inet:127.0.0.1:60000 #postgrey
permit
smtpd_client_restrictions =
reject_invalid_hostname,
permit