smtpd_delay_reject = yes

smtpd_sender_restrictions =
        reject_non_fqdn_sender
        reject_unknown_sender_domain
        check_sender_access hash:/etc/postfix/sender_access

smtpd_client_restrictions =
        permit_mynetworks
        #hijacked and openproxy
#       reject_rbl_client dnsbl.sorbs.net
        #spam trap
        #reject_rbl_client virbl.bit.nl
        #spam source
#       reject_rbl_client sbl-xbl.spamhaus.org
        #user submit
        #reject_rbl_client bl.spamcop.net
        #open relays
        # dead
        #reject_rbl_client relays.ordb.org
        reject_rbl_client list.dsbl.org

smtpd_recipient_restrictions =
        reject_non_fqdn_recipient
        reject_unknown_recipient_domain
        permit_mynetworks
        reject_unauth_destination
        check_policy_service inet:127.0.0.1:2501