Blacklists Compared

1 January 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
51157(total number of IP addresses tested, including 139 at SDSC)
48793(union of most IP zones)
42547b.barracudacentral.org
41759zen.spamhaus.org (union of all results)
41662l2.apews.org
40772zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
40772cbl.abuseat.org
34828hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30669dnsbl-1.uceprotect.net
29891bl.mailspike.net (union of all results)
28437zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
26313dnsbl-2.uceprotect.net
26279dnsbl-3.uceprotect.net
23942spam.dnsbl.sorbs.net
23638bl.spameatingmonkey.net
21489ubl.unsubscore.com
20846psbl.surriel.com
20183bl.tiopan.com
18715blackholes.five-ten-sg.com (union of all results)
16110hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14374bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13225bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11625bl.score.senderscore.com
10873db.wpbl.info
10728dnsbl.sorbs.net (union of all results)
9361blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8308blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
8243bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7545bl.spamcop.net
6457dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6150hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5867bl.mailspike.net (result 127.0.0.12 = bad reputation)
5367ips.backscatterer.org
5112no-more-funn.moensted.dk (union of all results)
4254zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3925list.dnswl.org (not a blacklist!)
3660dnsbl.inps.de
3640dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3486ix.dnsbl.manitu.net
3146no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2484hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2165wl.mailspike.net (union of all results) (not a blacklist!)
2101wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1796no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1606mail-abuse.blacklist.jippg.org
1577hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1408bl.spamcannibal.org
1130spamsources.fabel.dk
1032blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
882korea.services.net
790dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
702hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
573accredit.habeas.com (not a blacklist!)
558dnsbl.njabl.org (union of all results)
506query.bondedsender.org (not a blacklist!)
438l2.bbfh.ext.sorbs.net
431dnsbl.njabl.org (result 127.0.0.9 = open proxy)
388zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
388zen.spamhaus.org (union of SBL and SBLCSS results)
331aspews.ext.sorbs.net
299tr.countries.nerd.dk
149dnsbl.ahbl.org (union of all results)
143l1.bbfh.ext.sorbs.net
119iadb2.isipp.com (not a blacklist!)
101iadb.isipp.com (not a blacklist!)
97dnsbl.njabl.org (result 127.0.0.2 = open relay)
94no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
90dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
90dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
90dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
85hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
84dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
59no-more-funn.moensted.dk (result 127.0.0.9 = misc)
56wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
48dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
38no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
30tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
30dnsbl.njabl.org (result 127.0.0.4 = spam source)
30tor.dnsbl.sectoor.de (union of all results)
21hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17bl.deadbeef.com
17dnsbl.ahbl.org (result 127.0.0.4 = spam source)
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
10multi.surbl.org
10swl.spamhaus.org (union of all results) (not a blacklist!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
4swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
51157(total number of IP addresses whose names were tested, including 139 at SDSC)
29595hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24225hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21335(union of most domain zones)
18147abuse.rfc-ignorant.org
15862l1.apews.org
6118whois.rfc-ignorant.org (union of all results)
4312whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2902hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2750hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1807whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
702hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
333urired.spameatingmonkey.net
326dbl.spamhaus.org
260hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
138hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
133hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
65hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
59multi.surbl.org
26rhsbl.ahbl.org
25dob.sibl.support-intelligence.net
23postmaster.rfc-ignorant.org
17multi.uribl.com (result 127.0.0.2 = spam resource)
17multi.uribl.com (union of all results)
16dsn.rfc-ignorant.org (zone not intended for this use)
15bogusmx.rfc-ignorant.org
13fresh.spameatingmonkey.net
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
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
18889(total number of domains tested, including 119 at SDSC)
16654hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5054(union of most domain zones)
2976hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2035whois.rfc-ignorant.org (union of all results)
1979hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1948hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1892whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1346abuse.rfc-ignorant.org
772urired.spameatingmonkey.net
730postmaster.rfc-ignorant.org
671hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
621dbl.spamhaus.org
615hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
609l1.apews.org
505multi.uribl.com (union of all results)
497multi.uribl.com (result 127.0.0.2 = spam resource)
482multi.surbl.org
379bogusmx.rfc-ignorant.org
366hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
227dsn.rfc-ignorant.org
170dob.sibl.support-intelligence.net
144fresh.spameatingmonkey.net
143whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10rhsbl.ahbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
5hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send 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 3 January 2011.