Blacklists Compared

20 July 2013

[ 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
84156(total number of IP addresses tested, including 157 at SDSC)
79194(union of most IP zones)
70783b.barracudacentral.org
70690zen.spamhaus.org (union of all results)
69836l2.apews.org
62262cbl.abuseat.org
62256zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
60570bl.tiopan.com
53742spam.dnsbl.sorbs.net
48312hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
47623dnsbl-1.uceprotect.net
47606bl.mailspike.net (union of all results)
46495zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
44477psbl.surriel.com
40800hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
39653db.wpbl.info
37419dnsbl.sorbs.net (union of all results)
32707bl.spameatingmonkey.net
30664bl.mailspike.net (result 127.0.0.12 = bad reputation)
29923dnsbl-2.uceprotect.net
29440dnsbl-3.uceprotect.net
27852all.spamrats.com (union of all results)
26854dnsbl.inps.de
23470ubl.unsubscore.com
22969truncate.gbudb.net
20163dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18406all.spamrats.com (result 127.0.0.36 = dialup)
16559dnsbl.sorbs.net (result 127.0.0.6 = spam source)
15848bl.score.senderscore.com
15022dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14353bl.spamcop.net
13540ips.backscatterer.org
12644bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
11242bl.mav.com.br
9156all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7517zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7489ix.dnsbl.manitu.net
6200list.dnswl.org (not a blacklist!)
5640wl.mailspike.net (union of all results) (not a blacklist!)
4726bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4527hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4051all.s5h.net
3545wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3287hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2682bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2452hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2229hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1679bl.spamcannibal.org
1568tr.countries.nerd.dk
1555spamsources.fabel.dk
1469wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1449free.v4bl.org
1405zen.spamhaus.org (union of SBL and SBLCSS results)
915zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
735accredit.habeas.com (not a blacklist!)
707hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
617query.bondedsender.org (not a blacklist!)
549wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
534korea.services.net
490zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
442mail-abuse.blacklist.jippg.org
370all.spamrats.com (result 127.0.0.38 = spam source)
203iadb.isipp.com (not a blacklist!)
118iadb2.isipp.com (not a blacklist!)
109dnsbl.ahbl.org (union of all results)
88dnsbl.ahbl.org (result 127.0.0.4 = spam source)
78wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
60dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
60dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
60dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
40tor.dnsbl.sectoor.de (union of all results)
38tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
20dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl-0.uceprotect.net
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3multi.surbl.org
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2l2.bbfh.ext.sorbs.net
2spamguard.leadmon.net (union of all results)
1wadb.isipp.com
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
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
84156(total number of IP addresses whose names were tested, including 157 at SDSC)
48850hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37302hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
26868l1.apews.org
7335hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3065(union of most domain zones)
2512hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1087hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1041dbl.spamhaus.org (result 127.0.1.2 = spam source)
1041dbl.spamhaus.org (union of all results)
1003hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
391hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
344hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
154fresh.spameatingmonkey.net
112hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
108multi.surbl.org
93dob.sibl.support-intelligence.net
48rhsbl.ahbl.org
39hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24urired.spameatingmonkey.net
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
77782(total number of domains tested, including 115 at SDSC)
68491hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3782(union of most domain zones)
3651hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1960hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1906dbl.spamhaus.org (union of all results)
1901dbl.spamhaus.org (result 127.0.1.2 = spam source)
1462hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1420fresh.spameatingmonkey.net
1348hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1306multi.surbl.org
967hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
408dob.sibl.support-intelligence.net
367l1.apews.org
217hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
134urired.spameatingmonkey.net
36rhsbl.ahbl.org
32hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 July 2013.