b.barracudacentral.org
bl.blocklist.de
bl.spamcop.net
cbl.abuseat.org
dnsbl-1.uceprotect.net
dnsbl-2.uceprotect.net
dnsbl-3.uceprotect.net
dnsbl.abuse.ch
ix.dnsbl.manitu.net
pbl.spamhaus.org
sbl.spamhaus.org
xbl.spamhaus.org
zen.spamhaus.org