smtpd_helo_required = yes 
smtpd_recipient_restrictions =
  reject_invalid_hostname,
  reject_non_fqdn_hostname,
  reject_non_fqdn_sender,
  reject_non_fqdn_recipient,
  reject_unknown_sender_domain,
  reject_unknown_recipient_domain,
  permit_mynetworks,
  permit_sasl_authenticated,
  reject_unauth_destination,
  reject_unlisted_recipient,
  check_client_access mysql:/etc/postfix/mysql-virtual_access.cf,
  reject_rbl_client zen.spamhaus.org,
  reject_rbl_client bl.spamcop.net,
  check_policy_service inet:127.0.0.1:60000,
  permit
smtpd_data_restrictions =
  reject_unauth_pipelining,
  permit