reject_rbl_client zen.spamhaus.org
reject_rbl_client multi.uribl.com
reject_rbl_client dnsbl.njabl.org
reject_rbl_client cbl.abuseat.org
reject_rbl_client bl.spamcop.net
# reject_rbl_client dnsbl.sorbs.net
reject_rbl_client combined.rbl.msrbl.net
# reject_rbl_client b.barracudacentral.org