Blacklists Compared

24 September 2011

[ 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
54594(total number of IP addresses tested, including 194 at SDSC)
51886(union of most IP zones)
42328b.barracudacentral.org
41945l2.apews.org
41061zen.spamhaus.org (union of all results)
39083cbl.abuseat.org
39055zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
34353hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30368bl.mailspike.net (union of all results)
29508ddnsbl.internetdefensesystems.com
28748spam.dnsbl.sorbs.net
26861dnsbl-1.uceprotect.net
26738zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
26242dnsbl-2.uceprotect.net
26209dnsbl-3.uceprotect.net
24945dnsbl.sorbs.net (union of all results)
22444bl.tiopan.com
21372truncate.gbudb.net
19042hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18539bl.spameatingmonkey.net
18515ubl.unsubscore.com
17763blackholes.five-ten-sg.com (union of all results)
16490dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
15064psbl.surriel.com
13415bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
13306bl.mailspike.net (result 127.0.0.11 = very bad reputation)
13266bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
10972dnsbl.sorbs.net (result 127.0.0.6 = spam source)
8974blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7153blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7045dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6615db.wpbl.info
6071bl.score.senderscore.com
5979list.dnswl.org (not a blacklist!)
5840bl.spamcop.net
5241zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4977hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4918no-more-funn.moensted.dk (union of all results)
4386wl.mailspike.net (union of all results) (not a blacklist!)
4191dnsbl.inps.de
3854ix.dnsbl.manitu.net
2836wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2663hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2523hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2506no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2485ips.backscatterer.org
2361bl.mailspike.net (result 127.0.0.12 = bad reputation)
2184no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1666hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1607blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1592korea.services.net
1578bl.spamcannibal.org
1542wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1140spamsources.fabel.dk
1108mail-abuse.blacklist.jippg.org
585accredit.habeas.com (not a blacklist!)
553query.bondedsender.org (not a blacklist!)
402dnsbl.njabl.org (union of all results)
373zen.spamhaus.org (union of SBL and SBLCSS results)
336dnsbl.njabl.org (result 127.0.0.9 = open proxy)
317aspews.ext.sorbs.net
301dnsbl.ahbl.org (union of all results)
288zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
275tr.countries.nerd.dk
214iadb2.isipp.com (not a blacklist!)
204dnsbl.ahbl.org (result 127.0.0.4 = spam source)
193iadb.isipp.com (not a blacklist!)
166hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
109no-more-funn.moensted.dk (result 127.0.0.9 = misc)
94dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
94dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
94dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
89no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
85zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
72l2.bbfh.ext.sorbs.net
65dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
47no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
39dnsbl.njabl.org (result 127.0.0.2 = open relay)
37tor.dnsbl.sectoor.de (union of all results)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27dnsbl.njabl.org (result 127.0.0.4 = spam source)
18swl.spamhaus.org (union of all results) (not a blacklist!)
12bl.deadbeef.com
8dnsbl-0.uceprotect.net
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8l1.bbfh.ext.sorbs.net
6multi.surbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (union of all results)
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
54594(total number of IP addresses whose names were tested, including 194 at SDSC)
29662hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23686hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20290(union of most domain zones)
16013abuse.rfc-ignorant.org
13033l1.apews.org
8491whois.rfc-ignorant.org (union of all results)
7312whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4257hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2865hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1180whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
371hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
302dbl.spamhaus.org (result 127.0.1.2 = spam source)
302dbl.spamhaus.org (union of all results)
266hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
254hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
228hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
205urired.spameatingmonkey.net
144hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50fresh.spameatingmonkey.net
45postmaster.rfc-ignorant.org
34bogusmx.rfc-ignorant.org
23multi.surbl.org
20multi.uribl.com (result 127.0.0.2 = spam resource)
20multi.uribl.com (union of all results)
19rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13dob.sibl.support-intelligence.net
4dsn.rfc-ignorant.org (zone not intended for this use)
2bl.deadbeef.com
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
32332(total number of domains tested, including 157 at SDSC)
23021hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6246(union of most domain zones)
4012hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2769whois.rfc-ignorant.org (union of all results)
2637whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2176hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2067hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1387abuse.rfc-ignorant.org
828urired.spameatingmonkey.net
759postmaster.rfc-ignorant.org
725hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
659l1.apews.org
634dbl.spamhaus.org (union of all results)
633dbl.spamhaus.org (result 127.0.1.2 = spam source)
620bogusmx.rfc-ignorant.org
603hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
488multi.uribl.com (union of all results)
474multi.uribl.com (result 127.0.0.2 = spam resource)
442multi.surbl.org
342hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
253dsn.rfc-ignorant.org
143fresh.spameatingmonkey.net
132whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
73dob.sibl.support-intelligence.net
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 September 2011.