my_networks= my_hostname= smtpd_client_restrictions smtpd_sender_restrictions smtpd_helo_restrictions smtpd_relay_restrictions smtpd_etrn_restrictions smtdp_data_restrictions smtdp_end_of_data_restrictions permit_my_networks reject_unknown_client reject_unknown_client_hostname reject_unknown_reverse_client_hostname reject_anouth_destination reject_non_fqdn_sender reject_non_fqdn_recipient reject_unauth_pipelining check_policy_service reject_