Blacklists Compared

30 July 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
40573(total number of IP addresses tested, including 170 at SDSC)
37307(union of most IP zones)
28989l2.apews.org
28808b.barracudacentral.org
26561zen.spamhaus.org (union of all results)
24578zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
24577cbl.abuseat.org
22902hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
20590bl.mailspike.net (union of all results)
18404spam.dnsbl.sorbs.net
18323dnsbl-1.uceprotect.net
17098hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16887zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
15047dnsbl-2.uceprotect.net
14864blackholes.five-ten-sg.com (union of all results)
14741dnsbl-3.uceprotect.net
14580bl.tiopan.com
13977ddnsbl.internetdefensesystems.com
12916truncate.gbudb.net
11868bl.spameatingmonkey.net
10297bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
10044psbl.surriel.com
9800dnsbl.sorbs.net (union of all results)
9733ubl.unsubscore.com
9681bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8395blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7919bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5998dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5501list.dnswl.org (not a blacklist!)
4802blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4534no-more-funn.moensted.dk (union of all results)
4481db.wpbl.info
4252bl.spamcop.net
4212wl.mailspike.net (union of all results) (not a blacklist!)
3597dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3513bl.score.senderscore.com
3458zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2902hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2746ix.dnsbl.manitu.net
2710no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2645hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2546wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2507hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2378ips.backscatterer.org
2352dnsbl.inps.de
2045bl.mailspike.net (result 127.0.0.12 = bad reputation)
1671no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1655wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1636blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1554hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1493korea.services.net
1153dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1148bl.spamcannibal.org
1057spamsources.fabel.dk
807mail-abuse.blacklist.jippg.org
592accredit.habeas.com (not a blacklist!)
558query.bondedsender.org (not a blacklist!)
484zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
484zen.spamhaus.org (union of SBL and SBLCSS results)
355dnsbl.njabl.org (union of all results)
322aspews.ext.sorbs.net
317tr.countries.nerd.dk
242dnsbl.njabl.org (result 127.0.0.9 = open proxy)
185iadb2.isipp.com (not a blacklist!)
163iadb.isipp.com (not a blacklist!)
152dnsbl.ahbl.org (union of all results)
100l2.bbfh.ext.sorbs.net
80no-more-funn.moensted.dk (result 127.0.0.9 = misc)
75dnsbl.ahbl.org (result 127.0.0.4 = spam source)
70no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
68dnsbl.njabl.org (result 127.0.0.2 = open relay)
60hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
58dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
47dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
45dnsbl.njabl.org (result 127.0.0.4 = spam source)
36l1.bbfh.ext.sorbs.net
30tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30tor.dnsbl.sectoor.de (union of all results)
29no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
19dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
18swl.spamhaus.org (union of all results) (not a blacklist!)
11wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
11bl.deadbeef.com
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5spamguard.leadmon.net (union of all results)
4swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4multi.surbl.org
4multi.uribl.com (union of all results)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dnsbl-0.uceprotect.net
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
40573(total number of IP addresses whose names were tested, including 170 at SDSC)
23336hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19452hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14849(union of most domain zones)
12019abuse.rfc-ignorant.org
9676l1.apews.org
5442whois.rfc-ignorant.org (union of all results)
4502whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3127hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2897hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
943whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
444hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
227hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
222dbl.spamhaus.org (result 127.0.1.2 = spam source)
222dbl.spamhaus.org (union of all results)
195hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
183hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
168urired.spameatingmonkey.net
68hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
42postmaster.rfc-ignorant.org
37bogusmx.rfc-ignorant.org
21dob.sibl.support-intelligence.net
18rhsbl.ahbl.org
17multi.surbl.org
15fresh.spameatingmonkey.net
10multi.uribl.com (result 127.0.0.2 = spam resource)
10multi.uribl.com (union of all results)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4dsn.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
24522(total number of domains tested, including 144 at SDSC)
20635hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6646(union of most domain zones)
4075hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3738whois.rfc-ignorant.org (union of all results)
3587whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2146hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2006hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1506abuse.rfc-ignorant.org
745l1.apews.org
721postmaster.rfc-ignorant.org
603hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
587bogusmx.rfc-ignorant.org
515hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
442urired.spameatingmonkey.net
402dbl.spamhaus.org (result 127.0.1.2 = spam source)
402dbl.spamhaus.org (union of all results)
338hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
336multi.surbl.org
332multi.uribl.com (union of all results)
326multi.uribl.com (result 127.0.0.2 = spam resource)
287dsn.rfc-ignorant.org
151whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
81dob.sibl.support-intelligence.net
70fresh.spameatingmonkey.net
32hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9ex.dnsbl.org
5multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2hostkarma.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 1 August 2011.