Blacklists Compared

19 July 2014

[ 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 (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
33952(total number of IP addresses tested, including 142 at SDSC)
29439(union of most IP zones)
22861l2.apews.org
22588b.barracudacentral.org
20633zen.spamhaus.org (union of all results)
18316cbl.abuseat.org
18312zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16464ubl.unsubscore.com
16121hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14373hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14138spam.dnsbl.sorbs.net
13183dnsbl-1.uceprotect.net
12966zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
11406all.s5h.net
11074bl.tiopan.com
8607all.spamrats.com (union of all results)
7895dnsbl-2.uceprotect.net
7713dnsbl.sorbs.net (union of all results)
7050psbl.surriel.com
6574dnsbl-3.uceprotect.net
6324list.dnswl.org (not a blacklist!)
6058dnsbl.inps.de
5867db.wpbl.info
5841truncate.gbudb.net
5547wl.mailspike.net (union of all results) (not a blacklist!)
5061bl.mailspike.net (union of all results)
4800all.spamrats.com (result 127.0.0.36 = dialup)
3970bl.spameatingmonkey.net
3686bl.spamcop.net
3563dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3401all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3003hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2894dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2888wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2653dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2422hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2359ips.backscatterer.org
2348bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2241hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1834ix.dnsbl.manitu.net
1758zen.spamhaus.org (union of SBL and SBLCSS results)
1725bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1537bl.spamcannibal.org
1504wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1374hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1371zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1101bl.score.senderscore.com
1027wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
967spamsources.fabel.dk
946zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
838bl.mailspike.net (result 127.0.0.12 = bad reputation)
812zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
730accredit.habeas.com (not a blacklist!)
660query.bondedsender.org (not a blacklist!)
641free.v4bl.org
526bl.mailspike.net (result 127.0.0.11 = very bad reputation)
518mail-abuse.blacklist.jippg.org
445all.spamrats.com (result 127.0.0.38 = spam source)
432korea.services.net
229tr.countries.nerd.dk
146iadb.isipp.com (not a blacklist!)
129hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
128wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
105bl.mav.com.br
81dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
81dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
81dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
73iadb2.isipp.com (not a blacklist!)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29tor.dnsbl.sectoor.de (union of all results)
19spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
19spamguard.leadmon.net (union of all results)
18multi.uribl.com (union of all results)
17multi.uribl.com (result 127.0.0.2 = spam resource)
8dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl-0.uceprotect.net
3multi.surbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
33952(total number of IP addresses whose names were tested, including 142 at SDSC)
18563hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14384hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4973l1.apews.org
2309hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2304(union of most domain zones)
2266hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
931hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
891dbl.spamhaus.org (union of all results)
890dbl.spamhaus.org (result 127.0.1.2 = spam source)
815hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
472hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
192dob.sibl.support-intelligence.net
115hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
112hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
79multi.surbl.org
69fresh.spameatingmonkey.net
45multi.uribl.com (result 127.0.0.2 = spam resource)
45multi.uribl.com (union of all results)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20urired.spameatingmonkey.net
1dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
29220(total number of domains tested, including 92 at SDSC)
13697hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5009(union of most domain zones)
3834hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3591dbl.spamhaus.org (union of all results)
3589dbl.spamhaus.org (result 127.0.1.2 = spam source)
3169hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2644hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2225multi.uribl.com (union of all results)
2200multi.uribl.com (result 127.0.0.2 = spam resource)
2141multi.surbl.org
1238hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1219hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1027dob.sibl.support-intelligence.net
817fresh.spameatingmonkey.net
448l1.apews.org
202hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
66hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
29urired.spameatingmonkey.net
15multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 21 July 2014.