Blacklists Compared

7 January 2012

[ 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
47618(total number of IP addresses tested, including 167 at SDSC)
44941(union of most IP zones)
37220b.barracudacentral.org
36856l2.apews.org
36128zen.spamhaus.org (union of all results)
34594cbl.abuseat.org
34593zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27247ip.v4bl.org
25847bl.tiopan.com
25597spam.dnsbl.sorbs.net
25102hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23885zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
21713dnsbl-1.uceprotect.net
20144dnsbl-3.uceprotect.net
19918truncate.gbudb.net
19830bl.mailspike.net (union of all results)
19766dnsbl-2.uceprotect.net
19478dnsbl.sorbs.net (union of all results)
15626bl.spameatingmonkey.net
13074blackholes.five-ten-sg.com (union of all results)
12438psbl.surriel.com
12361hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
10421dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9474ubl.unsubscore.com
9032bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
8549bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8160dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7834ix.dnsbl.manitu.net
7214bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6196bl.spamcop.net
6074hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6031blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5752blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5520dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5406list.dnswl.org (not a blacklist!)
5291zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4683db.wpbl.info
3639no-more-funn.moensted.dk (union of all results)
3496wl.mailspike.net (union of all results) (not a blacklist!)
3037bl.score.senderscore.com
2949dnsbl.inps.de
2402ips.backscatterer.org
2292hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2286wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2153hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1774no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1773no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1537hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1395korea.services.net
1284blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1204wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1140bl.spamcannibal.org
974spamsources.fabel.dk
661accredit.habeas.com (not a blacklist!)
622query.bondedsender.org (not a blacklist!)
601mail-abuse.blacklist.jippg.org
411l2.bbfh.ext.sorbs.net
395zen.spamhaus.org (union of SBL and SBLCSS results)
378l1.bbfh.ext.sorbs.net
351dnsbl.njabl.org (union of all results)
319zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
295dnsbl.njabl.org (result 127.0.0.9 = open proxy)
271aspews.ext.sorbs.net
260tr.countries.nerd.dk
238dnsbl.ahbl.org (union of all results)
197iadb.isipp.com (not a blacklist!)
137dnsbl.ahbl.org (result 127.0.0.4 = spam source)
135hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
95iadb2.isipp.com (not a blacklist!)
76zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
74dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
72no-more-funn.moensted.dk (result 127.0.0.9 = misc)
70dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
70dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
70dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
38hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34dnsbl.njabl.org (result 127.0.0.2 = open relay)
27dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
25dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
23no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
22dnsbl.njabl.org (result 127.0.0.4 = spam source)
20tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
20tor.dnsbl.sectoor.de (union of all results)
15swl.spamhaus.org (union of all results) (not a blacklist!)
14no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
8multi.surbl.org
7swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5dnsbl-0.uceprotect.net
5bl.deadbeef.com
4swl.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!)
2spamguard.leadmon.net (union of all results)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1multi.uribl.com (union of all results)
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
47618(total number of IP addresses whose names were tested, including 167 at SDSC)
24528hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19074hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16059(union of most domain zones)
13227abuse.rfc-ignorant.org
11033l1.apews.org
6176whois.rfc-ignorant.org (union of all results)
5260whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3737hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2344hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
916whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
274hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
204dbl.spamhaus.org (result 127.0.1.2 = spam source)
204dbl.spamhaus.org (union of all results)
196hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
184hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
146hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
138urired.spameatingmonkey.net
137hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26postmaster.rfc-ignorant.org
24fresh.spameatingmonkey.net
23dob.sibl.support-intelligence.net
20bogusmx.rfc-ignorant.org
18multi.surbl.org
16rhsbl.ahbl.org
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
2dsn.rfc-ignorant.org (zone not intended for this use)
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
16947(total number of domains tested, including 144 at SDSC)
14713hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4338(union of most domain zones)
3319hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1859hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1776hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1724whois.rfc-ignorant.org (union of all results)
1619whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1245abuse.rfc-ignorant.org
680postmaster.rfc-ignorant.org
650dbl.spamhaus.org (result 127.0.1.2 = spam source)
650dbl.spamhaus.org (union of all results)
627hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
521hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
465multi.uribl.com (union of all results)
460l1.apews.org
454multi.surbl.org
453multi.uribl.com (result 127.0.0.2 = spam resource)
395urired.spameatingmonkey.net
281hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
279bogusmx.rfc-ignorant.org
190dsn.rfc-ignorant.org
105whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
99dob.sibl.support-intelligence.net
92fresh.spameatingmonkey.net
17hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11rhsbl.ahbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.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 9 January 2012.