Blacklists Compared

9 August 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
30913(total number of IP addresses tested, including 178 at SDSC)
25955(union of most IP zones)
20093l2.apews.org
17877zen.spamhaus.org (union of all results)
15919cbl.abuseat.org
15915zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15675b.barracudacentral.org
14683ubl.unsubscore.com
14434all.s5h.net
14208hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14038spam.dnsbl.sorbs.net
13891hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
12344dnsbl-1.uceprotect.net
10765bl.tiopan.com
10743zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
8548all.spamrats.com (union of all results)
7388dnsbl-2.uceprotect.net
7090dnsbl.sorbs.net (union of all results)
6639dnsbl-3.uceprotect.net
6174list.dnswl.org (not a blacklist!)
5949dnsbl.inps.de
5937bl.mailspike.net (union of all results)
5808db.wpbl.info
5315truncate.gbudb.net
5215wl.mailspike.net (union of all results) (not a blacklist!)
4792all.spamrats.com (result 127.0.0.36 = dialup)
4722bl.spameatingmonkey.net
3875psbl.surriel.com
3817bl.spamcop.net
3746bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3396all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3139hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3016dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2856dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2697wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2600hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2537ips.backscatterer.org
2394dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2128hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1766hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1636zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1587bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1469zen.spamhaus.org (union of SBL and SBLCSS results)
1355wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1353bl.spamcannibal.org
1140bl.score.senderscore.com
1017ix.dnsbl.manitu.net
1011wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
843spamsources.fabel.dk
757accredit.habeas.com (not a blacklist!)
739zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
730zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
667query.bondedsender.org (not a blacklist!)
664free.v4bl.org
566bl.mailspike.net (result 127.0.0.12 = bad reputation)
539bl.mailspike.net (result 127.0.0.11 = very bad reputation)
458korea.services.net
395all.spamrats.com (result 127.0.0.38 = spam source)
374mail-abuse.blacklist.jippg.org
213tr.countries.nerd.dk
152wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
147iadb.isipp.com (not a blacklist!)
112hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
67iadb2.isipp.com (not a blacklist!)
49bl.mav.com.br
35dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
35dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21tor.dnsbl.sectoor.de (union of all results)
17spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
17spamguard.leadmon.net (union of all results)
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1dnsbl-0.uceprotect.net
1multi.surbl.org
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
30913(total number of IP addresses whose names were tested, including 178 at SDSC)
17472hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13204hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4503l1.apews.org
2365hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2227hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2058(union of most domain zones)
884hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
744dbl.spamhaus.org (union of all results)
743dbl.spamhaus.org (result 127.0.1.2 = spam source)
729hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
344hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
86hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
69hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
54multi.surbl.org
52multi.uribl.com (union of all results)
51multi.uribl.com (result 127.0.0.2 = spam resource)
45fresh.spameatingmonkey.net
44dob.sibl.support-intelligence.net
36hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19urired.spameatingmonkey.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
23918(total number of domains tested, including 159 at SDSC)
14741hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4015(union of most domain zones)
3122hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2858dbl.spamhaus.org (union of all results)
2853dbl.spamhaus.org (result 127.0.1.2 = spam source)
2841hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2048hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2023multi.uribl.com (union of all results)
2011multi.uribl.com (result 127.0.0.2 = spam resource)
1917multi.surbl.org
1315hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1247hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
584fresh.spameatingmonkey.net
584dob.sibl.support-intelligence.net
459l1.apews.org
190hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
39hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22urired.spameatingmonkey.net
11hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 August 2014.