smtpd_recipient_restrictions =                                                                                                                                                                                                                                                      
  permit_sasl_authenticated,                                                                                                                                                                                                                                                        
  reject_unauth_destination,                                                                                                                                                                                                                                                        
  reject_rbl_client dnsbl.njabl.org,                                                                                                                                                                                                                                                
  reject_rbl_client sbl-xbl.spamhaus.org,                                                                                                                                                                                                                                           
  permit