Blacklists Compared

8 June 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
59798(total number of IP addresses tested, including 160 at SDSC)
54635(union of most IP zones)
45962l2.apews.org
45913zen.spamhaus.org (union of all results)
45467b.barracudacentral.org
43711bl.mailspike.net (union of all results)
41954cbl.abuseat.org
41948zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
38478bl.tiopan.com
33122spam.dnsbl.sorbs.net
31869hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30597hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
29713zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
28895dnsbl-1.uceprotect.net
27917bl.mailspike.net (result 127.0.0.12 = bad reputation)
25709dnsbl.sorbs.net (union of all results)
23887psbl.surriel.com
21535db.wpbl.info
19291bl.spameatingmonkey.net
18627all.spamrats.com (union of all results)
17167dnsbl-2.uceprotect.net
16893dnsbl-3.uceprotect.net
16539dnsbl.inps.de
15765ubl.unsubscore.com
14473dnsbl.sorbs.net (result 127.0.0.6 = spam source)
13906truncate.gbudb.net
12876dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12098bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12066all.spamrats.com (result 127.0.0.36 = dialup)
10366bl.spamcop.net
9600dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8491bl.score.senderscore.com
6708list.dnswl.org (not a blacklist!)
6659wl.mailspike.net (union of all results) (not a blacklist!)
6356all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6275ips.backscatterer.org
6239ix.dnsbl.manitu.net
4855zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4439wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4370bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4092hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3525bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3301hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2905bl.mav.com.br
2828hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1695wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1537hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1470bl.spamcannibal.org
1440tr.countries.nerd.dk
1356spamsources.fabel.dk
1133all.s5h.net
1102zen.spamhaus.org (union of SBL and SBLCSS results)
856hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
811free.v4bl.org
795accredit.habeas.com (not a blacklist!)
661query.bondedsender.org (not a blacklist!)
551zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
551zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
518mail-abuse.blacklist.jippg.org
491wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
267korea.services.net
258all.spamrats.com (result 127.0.0.38 = spam source)
245iadb.isipp.com (not a blacklist!)
240l2.bbfh.ext.sorbs.net
125dnsbl.ahbl.org (union of all results)
122iadb2.isipp.com (not a blacklist!)
86dnsbl.ahbl.org (result 127.0.0.4 = spam source)
36wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
36tor.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)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
25dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
21spamguard.leadmon.net (union of all results)
20spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
9multi.surbl.org
4wadb.isipp.com
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2multi.uribl.com (union of all results)
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
59798(total number of IP addresses whose names were tested, including 160 at SDSC)
35632hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
27133hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16869l1.apews.org
5430hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2632hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1983(union of most domain zones)
856hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
850dbl.spamhaus.org (result 127.0.1.2 = spam source)
850dbl.spamhaus.org (union of all results)
317hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
272hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
246hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
112hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
102multi.surbl.org
76multi.uribl.com (result 127.0.0.2 = spam resource)
76multi.uribl.com (union of all results)
40rhsbl.ahbl.org
38fresh.spameatingmonkey.net
33dob.sibl.support-intelligence.net
24urired.spameatingmonkey.net
18hostkarma.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
50683(total number of domains tested, including 119 at SDSC)
41550hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3723hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3387(union of most domain zones)
2416dbl.spamhaus.org (union of all results)
2414dbl.spamhaus.org (result 127.0.1.2 = spam source)
2197hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1614multi.uribl.com (union of all results)
1599multi.surbl.org
1598multi.uribl.com (result 127.0.0.2 = spam resource)
1471hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1404hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1291hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
490dob.sibl.support-intelligence.net
479fresh.spameatingmonkey.net
435l1.apews.org
202hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
120urired.spameatingmonkey.net
35hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
29rhsbl.ahbl.org
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
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)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 June 2013.