Blacklists Compared

13 October 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
37270(total number of IP addresses tested, including 149 at SDSC)
32837(union of most IP zones)
25244ip.v4bl.org
24860b.barracudacentral.org
24474zen.spamhaus.org (union of all results)
24276l2.apews.org
23360zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
23358cbl.abuseat.org
21895hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20831bl.tiopan.com
20060hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
15323dnsbl-1.uceprotect.net
14638zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12840wl.mailspike.net (union of all results) (not a blacklist!)
12819ubl.unsubscore.com
12628psbl.surriel.com
11243all.spamrats.com (union of all results)
10655dnsbl-2.uceprotect.net
9917dnsbl-3.uceprotect.net
9518dnsbl.inps.de
9512bl.mailspike.net (union of all results)
8352spam.dnsbl.sorbs.net
7783bl.mailspike.net (result 127.0.0.12 = bad reputation)
7082dnsbl.sorbs.net (union of all results)
6438list.dnswl.org (not a blacklist!)
6417bl.spameatingmonkey.net
6195wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
5931wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5722all.spamrats.com (result 127.0.0.36 = dialup)
5232all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4786free.v4bl.org
4608db.wpbl.info
4568truncate.gbudb.net
3860dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3463dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3456bl.spamcop.net
3170hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2956hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2174ips.backscatterer.org
1984ix.dnsbl.manitu.net
1932zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1832bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1810zen.spamhaus.org (union of SBL and SBLCSS results)
1617hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1600all.s5h.net
1294bl.score.senderscore.com
1131bl.spamcannibal.org
1095zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1044hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1019bl.mailspike.net (result 127.0.0.11 = very bad reputation)
785accredit.habeas.com (not a blacklist!)
770spamsources.fabel.dk
715zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
676query.bondedsender.org (not a blacklist!)
620mail-abuse.blacklist.jippg.org
567wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
514korea.services.net
387tr.countries.nerd.dk
321all.spamrats.com (result 127.0.0.38 = spam source)
317aspews.ext.sorbs.net
293l2.bbfh.ext.sorbs.net
260iadb.isipp.com (not a blacklist!)
184bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
182dnsbl.njabl.org (union of all results)
148dnsbl.ahbl.org (union of all results)
147wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
143iadb2.isipp.com (not a blacklist!)
138dnsbl.njabl.org (result 127.0.0.9 = open proxy)
126hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
107dnsbl.ahbl.org (result 127.0.0.4 = spam source)
48tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
48tor.dnsbl.sectoor.de (union of all results)
35dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
35dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
23dnsbl.njabl.org (result 127.0.0.2 = open relay)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
21dnsbl.njabl.org (result 127.0.0.4 = spam source)
19dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
17dnsbl.sorbs.net (result 127.0.0.6 = spam source)
9hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4dnsbl-0.uceprotect.net
4multi.surbl.org
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4spamguard.leadmon.net (union of all results)
1swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
37270(total number of IP addresses whose names were tested, including 149 at SDSC)
19785hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16129hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6198l1.apews.org
2857hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2574hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1494(union of most domain zones)
497dbl.spamhaus.org (result 127.0.1.2 = spam source)
497dbl.spamhaus.org (union of all results)
481hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
370hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
304hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
199hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
78hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
37dob.sibl.support-intelligence.net
36rhsbl.ahbl.org
29multi.surbl.org
20multi.uribl.com (result 127.0.0.2 = spam resource)
20urired.spameatingmonkey.net
20multi.uribl.com (union of all results)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12fresh.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
20853(total number of domains tested, including 103 at SDSC)
17169hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4652(union of most domain zones)
3927hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3682hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3528dbl.spamhaus.org (union of all results)
3524dbl.spamhaus.org (result 127.0.1.2 = spam source)
2306multi.surbl.org
2014hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1776hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1723hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1366multi.uribl.com (union of all results)
1350multi.uribl.com (result 127.0.0.2 = spam resource)
623dob.sibl.support-intelligence.net
513l1.apews.org
501fresh.spameatingmonkey.net
390hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
40urired.spameatingmonkey.net
32hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
31hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
21rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 October 2012.