Blacklists Compared

29 December 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
28703(total number of IP addresses tested, including 136 at SDSC)
25344(union of most IP zones)
20056b.barracudacentral.org
18976l2.apews.org
18749zen.spamhaus.org (union of all results)
17649cbl.abuseat.org
17636zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
17482ip.v4bl.org
16605bl.tiopan.com
15010hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14508hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13112dnsbl-1.uceprotect.net
11776bl.mailspike.net (union of all results)
11498zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
10358ubl.unsubscore.com
10156spam.dnsbl.sorbs.net
9539psbl.surriel.com
9231bl.mailspike.net (result 127.0.0.12 = bad reputation)
8673dnsbl.sorbs.net (union of all results)
7573dnsbl-2.uceprotect.net
6753all.spamrats.com (union of all results)
6656dnsbl.inps.de
6601dnsbl-3.uceprotect.net
6435bl.spameatingmonkey.net
6375db.wpbl.info
5735wl.mailspike.net (union of all results) (not a blacklist!)
5211dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5134list.dnswl.org (not a blacklist!)
3889wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3756free.v4bl.org
3753truncate.gbudb.net
3443all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3098all.spamrats.com (result 127.0.0.36 = dialup)
2672dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2372bl.spamcop.net
2347dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2141bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2032hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2005hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1974bl.score.senderscore.com
1706ix.dnsbl.manitu.net
1673zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1484wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1437hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1424ips.backscatterer.org
1158bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1081hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1029zen.spamhaus.org (union of SBL and SBLCSS results)
844bl.spamcannibal.org
676accredit.habeas.com (not a blacklist!)
625zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
625spamsources.fabel.dk
539query.bondedsender.org (not a blacklist!)
525korea.services.net
404zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
379mail-abuse.blacklist.jippg.org
337tr.countries.nerd.dk
236all.spamrats.com (result 127.0.0.38 = spam source)
236l2.bbfh.ext.sorbs.net
230wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
187all.s5h.net
166iadb.isipp.com (not a blacklist!)
132wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
110dnsbl.ahbl.org (union of all results)
96dnsbl.njabl.org (union of all results)
90hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
75dnsbl.njabl.org (result 127.0.0.9 = open proxy)
71dnsbl.ahbl.org (result 127.0.0.4 = spam source)
63iadb2.isipp.com (not a blacklist!)
31bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
30tor.dnsbl.sectoor.de (union of all results)
28tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
24dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
23dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
23dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
23dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
12dnsbl.njabl.org (result 127.0.0.2 = open relay)
9dnsbl.njabl.org (result 127.0.0.4 = spam source)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6multi.surbl.org
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (union of all results)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1wadb.isipp.com
1dnsbl-0.uceprotect.net
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
28703(total number of IP addresses whose names were tested, including 136 at SDSC)
13799hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11148hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3737l1.apews.org
2023hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1810(union of most domain zones)
1490hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
716hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
468hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
345hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
320dbl.spamhaus.org (result 127.0.1.2 = spam source)
320dbl.spamhaus.org (union of all results)
118urired.spameatingmonkey.net
108hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
71hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
35multi.uribl.com (result 127.0.0.2 = spam resource)
35multi.uribl.com (union of all results)
26dob.sibl.support-intelligence.net
25fresh.spameatingmonkey.net
16rhsbl.ahbl.org
11multi.surbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
22778(total number of domains tested, including 85 at SDSC)
20924hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2601hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2378(union of most domain zones)
1576dbl.spamhaus.org (union of all results)
1574dbl.spamhaus.org (result 127.0.1.2 = spam source)
1461hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1454hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1445hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1031multi.surbl.org
935multi.uribl.com (union of all results)
925multi.uribl.com (result 127.0.0.2 = spam resource)
806urired.spameatingmonkey.net
662hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
488l1.apews.org
265hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
250dob.sibl.support-intelligence.net
239fresh.spameatingmonkey.net
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 December 2012.