Blacklists Compared

26 July 2014

[ 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
35900(total number of IP addresses tested, including 139 at SDSC)
31224(union of most IP zones)
23869l2.apews.org
22951b.barracudacentral.org
22606zen.spamhaus.org (union of all results)
20499cbl.abuseat.org
20497zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
18917ubl.unsubscore.com
17657all.s5h.net
17241hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
17077spam.dnsbl.sorbs.net
15918dnsbl-1.uceprotect.net
15918hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14017zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
13379bl.tiopan.com
10240dnsbl-2.uceprotect.net
9569all.spamrats.com (union of all results)
8989dnsbl.sorbs.net (union of all results)
8801dnsbl-3.uceprotect.net
8057dnsbl.inps.de
7904db.wpbl.info
7716bl.mailspike.net (union of all results)
6076list.dnswl.org (not a blacklist!)
5980truncate.gbudb.net
5778bl.spameatingmonkey.net
5517all.spamrats.com (result 127.0.0.36 = dialup)
5396wl.mailspike.net (union of all results) (not a blacklist!)
5275psbl.surriel.com
4825bl.spamcop.net
4823bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3981dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3690dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3679ips.backscatterer.org
3648all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3206dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2963hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2714wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2680hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2244bl.score.senderscore.com
2223ix.dnsbl.manitu.net
1875zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1798bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1767hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1705hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1695bl.spamcannibal.org
1491zen.spamhaus.org (union of SBL and SBLCSS results)
1479wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1040wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
1014spamsources.fabel.dk
975mail-abuse.blacklist.jippg.org
898bl.mailspike.net (result 127.0.0.12 = bad reputation)
765zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
734accredit.habeas.com (not a blacklist!)
726zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
683bl.mailspike.net (result 127.0.0.11 = very bad reputation)
657query.bondedsender.org (not a blacklist!)
513free.v4bl.org
500korea.services.net
456all.spamrats.com (result 127.0.0.38 = spam source)
272tr.countries.nerd.dk
216hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
163wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
158iadb.isipp.com (not a blacklist!)
92iadb2.isipp.com (not a blacklist!)
53dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
53dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
53dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
45bl.mav.com.br
31tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
31tor.dnsbl.sectoor.de (union of all results)
19spamguard.leadmon.net (union of all results)
18spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
16dnsbl-0.uceprotect.net
16multi.uribl.com (union of all results)
15multi.uribl.com (result 127.0.0.2 = spam resource)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3multi.surbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
35900(total number of IP addresses whose names were tested, including 139 at SDSC)
20106hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15332hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5500l1.apews.org
2469(union of most domain zones)
2333hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2269hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1061dbl.spamhaus.org (union of all results)
1060dbl.spamhaus.org (result 127.0.1.2 = spam source)
891hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
880hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
492hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
186hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
137hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
87multi.surbl.org
76fresh.spameatingmonkey.net
66multi.uribl.com (result 127.0.0.2 = spam resource)
66multi.uribl.com (union of all results)
60dob.sibl.support-intelligence.net
34hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
23urired.spameatingmonkey.net
1dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
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
29999(total number of domains tested, including 87 at SDSC)
15525hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4432(union of most domain zones)
3280hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3261hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2845dbl.spamhaus.org (union of all results)
2842dbl.spamhaus.org (result 127.0.1.2 = spam source)
2399hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2024multi.uribl.com (union of all results)
2006multi.uribl.com (result 127.0.0.2 = spam resource)
1931multi.surbl.org
1339hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1338hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
622fresh.spameatingmonkey.net
492dob.sibl.support-intelligence.net
490l1.apews.org
205hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
75hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
21urired.spameatingmonkey.net
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5ex.dnsbl.org
2dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 July 2014.