Blacklists Compared

16 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
31974(total number of IP addresses tested, including 140 at SDSC)
28422(union of most IP zones)
21474l2.apews.org
18943zen.spamhaus.org (union of all results)
18525b.barracudacentral.org
16990cbl.abuseat.org
16988zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15953ubl.unsubscore.com
15621hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14705spam.dnsbl.sorbs.net
14325hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14057all.s5h.net
13464dnsbl-1.uceprotect.net
12056zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
11115bl.tiopan.com
8942all.spamrats.com (union of all results)
7620dnsbl-2.uceprotect.net
7434dnsbl.sorbs.net (union of all results)
6954dnsbl-3.uceprotect.net
6869psbl.surriel.com
6513db.wpbl.info
6269dnsbl.inps.de
6260bl.mailspike.net (union of all results)
6169free.v4bl.org
6096list.dnswl.org (not a blacklist!)
5311truncate.gbudb.net
5263wl.mailspike.net (union of all results) (not a blacklist!)
4979all.spamrats.com (result 127.0.0.36 = dialup)
4916bl.spameatingmonkey.net
4040bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3659bl.spamcop.net
3581all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3186dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2946hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2924dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2699wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2597hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2570dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2506ips.backscatterer.org
1955ix.dnsbl.manitu.net
1809hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1759bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1597zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1578bl.spamcannibal.org
1437hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1396wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1294zen.spamhaus.org (union of SBL and SBLCSS results)
1188bl.score.senderscore.com
1042wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
813spamsources.fabel.dk
725zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
670accredit.habeas.com (not a blacklist!)
595query.bondedsender.org (not a blacklist!)
569zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
514bl.mailspike.net (result 127.0.0.11 = very bad reputation)
510bl.mailspike.net (result 127.0.0.12 = bad reputation)
473mail-abuse.blacklist.jippg.org
436korea.services.net
423all.spamrats.com (result 127.0.0.38 = spam source)
210tr.countries.nerd.dk
182iadb.isipp.com (not a blacklist!)
126wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
116hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
99iadb2.isipp.com (not a blacklist!)
43bl.mav.com.br
37dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
37dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
37dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
26tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
26tor.dnsbl.sectoor.de (union of all results)
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
7dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5dnsbl-0.uceprotect.net
4multi.surbl.org
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3spamguard.leadmon.net (union of all results)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
31974(total number of IP addresses whose names were tested, including 140 at SDSC)
17745hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13574hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4784l1.apews.org
2299hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2238hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2131(union of most domain zones)
861hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
823dbl.spamhaus.org (union of all results)
819dbl.spamhaus.org (result 127.0.1.2 = spam source)
760hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
511hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
110fresh.spameatingmonkey.net
102hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
83dob.sibl.support-intelligence.net
51multi.surbl.org
50multi.uribl.com (result 127.0.0.2 = spam resource)
50multi.uribl.com (union of all results)
43hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22urired.spameatingmonkey.net
3dbl.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 127.0.1.5 = malware domain)
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
26158(total number of domains tested, including 116 at SDSC)
15097hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4075(union of most domain zones)
3134hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2868dbl.spamhaus.org (union of all results)
2850hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2842dbl.spamhaus.org (result 127.0.1.2 = spam source)
2132hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2069multi.uribl.com (union of all results)
2055multi.uribl.com (result 127.0.0.2 = spam resource)
2053multi.surbl.org
1219hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1170hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
479dob.sibl.support-intelligence.net
459l1.apews.org
423fresh.spameatingmonkey.net
189hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
49hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26urired.spameatingmonkey.net
25dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 August 2014.