my_networks= my_hostname= permit_my_networks=yes smtpd_client_restrictions smtpd_sender_restrictions smtpd_helo_restrictions smptd_relay_restrictions smtpd_recipient_restritions smtpd_etrn_restrictions smtpd_data_restrictions smtpd_end_of_data_restrictions reject_unknown_client reject_unknown_client_hostname reject_unknown_reverse_client_hostname reject_unknown_server_domain reject_unauth_pipelining reject_unknown_recpient_domain check_policy_service recject_unknown_helo_hostname reject_unknown_sender_domain