Blacklists Compared

9 February 2008

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]


Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (127.0.0.1 result), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
181034(total number of IP addresses tested, including 467 at SDSC)
172926(union of most IP zones)
150854l2.apews.org
150791zen.spamhaus.org (union of all results)
141515t1.dnsbl.net.au
119455pbl.spamhaus.org (union of all results)
103867sbl-xbl.spamhaus.org (union of all results)
103072xbl.spamhaus.org (union of all results)
102989cbl.abuseat.org
102858sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
102851xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
102847zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
90151pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
90135zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
86283psbl.surriel.com
85548dnsbl-3.uceprotect.net
84585dnsbl-2.uceprotect.net
82831dnsbl-1.uceprotect.net
81370dnsbl.sorbs.net (union of all results)
79109ubl.unsubscore.com
69960dnsbl.sorbs.net (result 127.0.0.10 = dialup)
68753no-more-funn.moensted.dk (union of all results)
62360blackholes.five-ten-sg.com (union of all results)
58956no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
58707hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
56733blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
36677bl.spamcop.net
31002ix.dnsbl.manitu.net
29619zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
29619pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
24439db.wpbl.info
12746unconfirmed.dsbl.org
12633list.dsbl.org
12627dsbl.dnsbl.net.au
11207dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11077bl.spamcannibal.org
10912tr.countries.nerd.dk
9145countries.blackholes.us (result 127.7.9.2 = Turkey)
8706no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8157mail-abuse.blacklist.jippg.org
6885countries.blackholes.us (result 127.6.4.3 = Russia)
6581countries.blackholes.us (result 127.0.7.6 = Brazil)
6380korea.services.net
6093rmst.dnsbl.net.au
5797countries.blackholes.us (result 127.4.1.0 = Korea)
4523blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4322list.dnswl.org (not a blacklist!)
4167ips.backscatterer.org
3823dnsbl.njabl.org (union of all results)
3625dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3324countries.blackholes.us (result 127.1.5.6 = China)
2703countries.blackholes.us (result 127.0.3.2 = Argentina)
2307dnsbl.ahbl.org (union of all results)
2198hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2114dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2084aspews.ext.sorbs.net
2057countries.blackholes.us (result 127.4.8.4 = Mexico)
1622spamsources.fabel.dk
1370countries.blackholes.us (result 127.7.6.4 = Thailand)
1088sbl.csma.biz
1041blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1015bl.csma.biz
937sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
937sbl.spamhaus.org
936zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
919countries.blackholes.us (result 127.3.9.2 = Japan)
899sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
898zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
898xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
847countries.blackholes.us (result 127.4.5.8 = Malaysia)
675no-more-funn.moensted.dk (result 127.0.0.9 = misc)
637probes.dnsbl.net.au
591countries.blackholes.us (result 127.1.5.8 = Taiwan)
579hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
342countries.blackholes.us (result 127.7.0.2 = Singapore)
330bl.deadbeef.com
321dnsbl.sorbs.net (result 127.0.0.6 = spam source)
294no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
257dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
239dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
238countries.blackholes.us (result 127.3.4.4 = Hong Kong)
224query.bondedsender.org (not a blacklist!)
222work.drbl.croco.net
183accredit.habeas.com (not a blacklist!)
172no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
150iadb2.isipp.com (not a blacklist!)
143iadb.isipp.com (not a blacklist!)
137multi.surbl.org
120dnsbl.ahbl.org (result 127.0.0.4 = spam source)
111dnsbl.njabl.org (result 127.0.0.4 = spam source)
105hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
87dnsbl.njabl.org (result 127.0.0.2 = open relay)
80multihop.dsbl.org
49dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
45blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
43multi.uribl.com (result 127.0.0.2 = spam resource)
43multi.uribl.com (union of all results)
31dnsbl.ahbl.org (result 127.0.0.15 = open relay)
30countries.blackholes.us (result 127.5.6.6 = Nigeria)
29relays.nether.net
29exemptions.ahbl.org (not a blacklist!)
23rdts.dnsbl.net.au
23dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
19spam.wytnij.to
17blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17spamguard.leadmon.net (union of all results)
11dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6spamguard.leadmon.net (result 127.0.0.8 = open proxy)
5blackholes.brainerd.net
5dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2owps.dnsbl.net.au
2osrs.dnsbl.net.au
2ohps.dnsbl.net.au
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamsites.dnsbl.net.au
1osps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
181034(total number of IP addresses whose names were tested, including 467 at SDSC)
115838(union of all domain zones)
97819l1.apews.org
72379rddn.dnsbl.net.au
71495abuse.rfc-ignorant.org
44346dynamic.rhs.mailpolice.com
44312whois.rfc-ignorant.org (union of all results)
29610whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
14702whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8072webmail.rhs.mailpolice.com
842multi.surbl.org
748multi.uribl.com (union of all results)
747multi.uribl.com (result 127.0.0.2 = spam resource)
594adv.rhs.mailpolice.com
123postmaster.rfc-ignorant.org
99bl.deadbeef.com
97bogusmx.rfc-ignorant.org
85dsn.rfc-ignorant.org (zone not intended for this use)
82rhsbl.ahbl.org
62bulk.rhs.mailpolice.com
19dob.sibl.support-intelligence.net
17rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
17rhsbl.sorbs.net (union of all results)
10porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
124670(total number of domains tested, including 436 at SDSC)
31125(union of all domain zones)
16742whois.rfc-ignorant.org (union of all results)
16179whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5994bogusmx.rfc-ignorant.org
4189abuse.rfc-ignorant.org
2399multi.surbl.org
2163multi.uribl.com (union of all results)
2103multi.uribl.com (result 127.0.0.2 = spam resource)
1751postmaster.rfc-ignorant.org
1588l1.apews.org
1160webmail.rhs.mailpolice.com
859dsn.rfc-ignorant.org
563whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
507porn.rhs.mailpolice.com
230adv.rhs.mailpolice.com
215rhsbl.ahbl.org
213bulk.rhs.mailpolice.com
143blackhole.securitysage.com
64rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
64rhsbl.sorbs.net (union of all results)
57multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
48rddn.dnsbl.net.au (zone not intended for this use)
44dob.sibl.support-intelligence.net
32dynamic.rhs.mailpolice.com
11ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3fraud.rhs.mailpolice.com
3bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 February 2008.