Blacklists Compared

2 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
35266(total number of IP addresses tested, including 150 at SDSC)
30346(union of most IP zones)
24610l2.apews.org
21964zen.spamhaus.org (union of all results)
19954zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19954cbl.abuseat.org
18535ubl.unsubscore.com
18402all.s5h.net
17803b.barracudacentral.org
17079hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
16982spam.dnsbl.sorbs.net
16363dnsbl-1.uceprotect.net
15891hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13767bl.tiopan.com
13135zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
9750all.spamrats.com (union of all results)
9428dnsbl.sorbs.net (union of all results)
9370dnsbl-2.uceprotect.net
8477dnsbl-3.uceprotect.net
7812psbl.surriel.com
7783dnsbl.inps.de
7686bl.mailspike.net (union of all results)
7200db.wpbl.info
6523bl.spameatingmonkey.net
6516truncate.gbudb.net
6108list.dnswl.org (not a blacklist!)
5512all.spamrats.com (result 127.0.0.36 = dialup)
5154bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5141wl.mailspike.net (union of all results) (not a blacklist!)
4395dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4137bl.spamcop.net
3829all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3670dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3337dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3033hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2722ips.backscatterer.org
2683hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2639wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2346hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2180zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1983bl.score.senderscore.com
1739bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1708hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1612ix.dnsbl.manitu.net
1485bl.spamcannibal.org
1415zen.spamhaus.org (union of SBL and SBLCSS results)
1389wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
965wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
899mail-abuse.blacklist.jippg.org
859spamsources.fabel.dk
720accredit.habeas.com (not a blacklist!)
714zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
701zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
648bl.mailspike.net (result 127.0.0.12 = bad reputation)
637query.bondedsender.org (not a blacklist!)
594bl.mailspike.net (result 127.0.0.11 = very bad reputation)
579korea.services.net
488free.v4bl.org
456all.spamrats.com (result 127.0.0.38 = spam source)
203tr.countries.nerd.dk
168hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
149wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
147iadb.isipp.com (not a blacklist!)
74iadb2.isipp.com (not a blacklist!)
50dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
50dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
50dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
49bl.mav.com.br
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
35tor.dnsbl.sectoor.de (union of all results)
19multi.uribl.com (result 127.0.0.2 = spam resource)
19multi.uribl.com (union of all results)
9dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2dnsbl-0.uceprotect.net
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
35266(total number of IP addresses whose names were tested, including 150 at SDSC)
20001hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15502hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6329l1.apews.org
2563hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2317hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2097(union of most domain zones)
813hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
800hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
782dbl.spamhaus.org (result 127.0.1.2 = spam source)
782dbl.spamhaus.org (union of all results)
355hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
120hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
76fresh.spameatingmonkey.net
71hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
62dob.sibl.support-intelligence.net
53hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
49multi.uribl.com (result 127.0.0.2 = spam resource)
49multi.surbl.org
49multi.uribl.com (union of all results)
15urired.spameatingmonkey.net
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
27492(total number of domains tested, including 106 at SDSC)
15194hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4592(union of most domain zones)
3410hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3399hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3016dbl.spamhaus.org (union of all results)
3008dbl.spamhaus.org (result 127.0.1.2 = spam source)
2477hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2017multi.uribl.com (union of all results)
2002multi.uribl.com (result 127.0.0.2 = spam resource)
1927multi.surbl.org
1380hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1260hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
688dob.sibl.support-intelligence.net
643fresh.spameatingmonkey.net
563l1.apews.org
219hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
36hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
22urired.spameatingmonkey.net
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4dbl.spamhaus.org (result 127.0.1.4 = phish domain)
3dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.6 = botnet command and control domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 August 2014.