Blacklists Compared

26 November 2011

[ 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
49763(total number of IP addresses tested, including 165 at SDSC)
46953(union of most IP zones)
37803l2.apews.org
36980zen.spamhaus.org (union of all results)
34948b.barracudacentral.org
34679zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
34679cbl.abuseat.org
31917ip.v4bl.org
25263bl.mailspike.net (union of all results)
25165hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23976dnsbl-1.uceprotect.net
23689dnsbl.sorbs.net (union of all results)
23506zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
23229dnsbl-2.uceprotect.net
23180dnsbl-3.uceprotect.net
22809spam.dnsbl.sorbs.net
19003bl.tiopan.com
18686truncate.gbudb.net
17907ix.dnsbl.manitu.net
16528dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
15954bl.spameatingmonkey.net
15542hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15070blackholes.five-ten-sg.com (union of all results)
13563psbl.surriel.com
12616bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11526bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
11098ubl.unsubscore.com
8586dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6927blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6537blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6141bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
5803list.dnswl.org (not a blacklist!)
5623db.wpbl.info
5474bl.spamcop.net
5258hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5204zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4332no-more-funn.moensted.dk (union of all results)
4111dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3935bl.score.senderscore.com
3544wl.mailspike.net (union of all results) (not a blacklist!)
2867dnsbl.inps.de
2399hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2341ips.backscatterer.org
2307wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2212hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2198no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1814no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1587blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1586hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1451korea.services.net
1229wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1116bl.spamcannibal.org
1073spamsources.fabel.dk
965mail-abuse.blacklist.jippg.org
633accredit.habeas.com (not a blacklist!)
599query.bondedsender.org (not a blacklist!)
573zen.spamhaus.org (union of SBL and SBLCSS results)
478zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
380dnsbl.njabl.org (union of all results)
309dnsbl.njabl.org (result 127.0.0.9 = open proxy)
276aspews.ext.sorbs.net
264dnsbl.ahbl.org (union of all results)
258tr.countries.nerd.dk
238l2.bbfh.ext.sorbs.net
214hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
171iadb.isipp.com (not a blacklist!)
170dnsbl.ahbl.org (result 127.0.0.4 = spam source)
167no-more-funn.moensted.dk (result 127.0.0.9 = misc)
122iadb2.isipp.com (not a blacklist!)
102no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
95zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
72dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
72dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
71no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
65dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
54l1.bbfh.ext.sorbs.net
49spamguard.leadmon.net (union of all results)
48spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
46dnsbl.njabl.org (result 127.0.0.2 = open relay)
29dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
28hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25dnsbl.njabl.org (result 127.0.0.4 = spam source)
21swl.spamhaus.org (union of all results) (not a blacklist!)
21tor.dnsbl.sectoor.de (union of all results)
20tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
18blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
16bl.deadbeef.com
11multi.surbl.org
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
7dnsbl-0.uceprotect.net
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.uribl.com (union of all results)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
49763(total number of IP addresses whose names were tested, including 165 at SDSC)
26373hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20955hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17758(union of most domain zones)
14033abuse.rfc-ignorant.org
11504l1.apews.org
7051whois.rfc-ignorant.org (union of all results)
6006whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3770hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2464hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1046whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
458hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
327hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
314dbl.spamhaus.org (union of all results)
313dbl.spamhaus.org (result 127.0.1.2 = spam source)
236hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
227hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
188hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
181urired.spameatingmonkey.net
55rhsbl.ahbl.org
38postmaster.rfc-ignorant.org
32bogusmx.rfc-ignorant.org
30multi.surbl.org
18multi.uribl.com (union of all results)
17multi.uribl.com (result 127.0.0.2 = spam resource)
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11fresh.spameatingmonkey.net
5dsn.rfc-ignorant.org (zone not intended for this use)
3dob.sibl.support-intelligence.net
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
20326(total number of domains tested, including 139 at SDSC)
16968hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5225(union of most domain zones)
3416hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2033hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2030whois.rfc-ignorant.org (union of all results)
1993hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1889whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1374abuse.rfc-ignorant.org
811dbl.spamhaus.org (result 127.0.1.2 = spam source)
811dbl.spamhaus.org (union of all results)
726hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
721postmaster.rfc-ignorant.org
690hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
572l1.apews.org
551multi.uribl.com (union of all results)
539multi.uribl.com (result 127.0.0.2 = spam resource)
494multi.surbl.org
484urired.spameatingmonkey.net
438bogusmx.rfc-ignorant.org
341hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
245dsn.rfc-ignorant.org
141whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
106fresh.spameatingmonkey.net
58dob.sibl.support-intelligence.net
24rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 November 2011.