Blacklists Compared

24 November 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
38080(total number of IP addresses tested, including 152 at SDSC)
33689(union of most IP zones)
26500l2.apews.org
26432b.barracudacentral.org
25809zen.spamhaus.org (union of all results)
24372ip.v4bl.org
24330zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
24329cbl.abuseat.org
23431bl.tiopan.com
19905hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
19581hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18000dnsbl-1.uceprotect.net
17090bl.mailspike.net (union of all results)
15042zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
14851bl.mailspike.net (result 127.0.0.12 = bad reputation)
12079dnsbl-2.uceprotect.net
11658psbl.surriel.com
11430dnsbl-3.uceprotect.net
10684all.spamrats.com (union of all results)
10152dnsbl.sorbs.net (union of all results)
9805wl.mailspike.net (union of all results) (not a blacklist!)
9133bl.spameatingmonkey.net
8747dnsbl.inps.de
8626spam.dnsbl.sorbs.net
8504ubl.unsubscore.com
7488dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6338list.dnswl.org (not a blacklist!)
6301db.wpbl.info
6128wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5694truncate.gbudb.net
5616all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4685all.spamrats.com (result 127.0.0.36 = dialup)
3905bl.spamcop.net
3169dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3064free.v4bl.org
2841wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2717zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2606hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2481hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2138ix.dnsbl.manitu.net
1992bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1792bl.score.senderscore.com
1747ips.backscatterer.org
1683hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1601bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1306zen.spamhaus.org (union of SBL and SBLCSS results)
1220bl.spamcannibal.org
924mail-abuse.blacklist.jippg.org
862tr.countries.nerd.dk
846hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
796accredit.habeas.com (not a blacklist!)
791zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
779all.s5h.net
730spamsources.fabel.dk
713korea.services.net
667query.bondedsender.org (not a blacklist!)
598wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
515zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
409all.spamrats.com (result 127.0.0.38 = spam source)
280iadb.isipp.com (not a blacklist!)
269l2.bbfh.ext.sorbs.net
248aspews.ext.sorbs.net
238wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
217dnsbl.ahbl.org (union of all results)
187dnsbl.njabl.org (union of all results)
168dnsbl.ahbl.org (result 127.0.0.4 = spam source)
153iadb2.isipp.com (not a blacklist!)
137dnsbl.njabl.org (result 127.0.0.9 = open proxy)
134hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
102bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
38tor.dnsbl.sectoor.de (union of all results)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
33dnsbl.njabl.org (result 127.0.0.2 = open relay)
33dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
27dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
27dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
27dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
17dnsbl.njabl.org (result 127.0.0.4 = spam source)
16dnsbl.sorbs.net (result 127.0.0.6 = spam source)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
15dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4dnsbl-0.uceprotect.net
4multi.surbl.org
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2wadb.isipp.com
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
38080(total number of IP addresses whose names were tested, including 152 at SDSC)
18116hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14682hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5169l1.apews.org
2486hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2423hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1557(union of most domain zones)
486hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
466dbl.spamhaus.org (result 127.0.1.2 = spam source)
466dbl.spamhaus.org (union of all results)
427hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
231hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
221hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
162urired.spameatingmonkey.net
93multi.uribl.com (union of all results)
92multi.uribl.com (result 127.0.0.2 = spam resource)
86multi.surbl.org
67hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
63fresh.spameatingmonkey.net
61dob.sibl.support-intelligence.net
32rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
30673(total number of domains tested, including 106 at SDSC)
27959hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3711(union of most domain zones)
3663hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2764hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2115hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2012dbl.spamhaus.org (union of all results)
2011hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2008dbl.spamhaus.org (result 127.0.1.2 = spam source)
1300multi.surbl.org
1296hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1179multi.uribl.com (union of all results)
1164multi.uribl.com (result 127.0.0.2 = spam resource)
619urired.spameatingmonkey.net
552l1.apews.org
473fresh.spameatingmonkey.net
457dob.sibl.support-intelligence.net
293hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 November 2012.