smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination,
        reject_rbl_client l1.spews.dnsbl.sorbs.net,
        reject_rbl_client bl.spamcop.net,
        reject_rbl_client list.dsbl.org,
        reject_rbl_client bhnc.njabl.org,
        reject_rbl_client combined.njabl.org,
        reject_rbl_client dul.dnsbl.sorbs.net,
        reject_rbl_client dnsbl.ahbl.org,
        reject_rbl_client dnsbl.dronebl.org,
        reject_rhsbl_sender rhsbl.ahbl.org