Blacklists Compared

28 January 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
47263(total number of IP addresses tested, including 162 at SDSC)
44351(union of most IP zones)
35854b.barracudacentral.org
35701l2.apews.org
34923zen.spamhaus.org (union of all results)
33651zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33650cbl.abuseat.org
31652ip.v4bl.org
26012bl.tiopan.com
24247spam.dnsbl.sorbs.net
24171hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23436zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
21441all.spamrats.com (union of all results)
20822dnsbl-1.uceprotect.net
19217dnsbl-3.uceprotect.net
18753dnsbl-2.uceprotect.net
18683bl.mailspike.net (union of all results)
17890truncate.gbudb.net
17883dnsbl.sorbs.net (union of all results)
14939bl.spameatingmonkey.net
14724hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14696psbl.surriel.com
11979blackholes.five-ten-sg.com (union of all results)
11609all.spamrats.com (result 127.0.0.36 = dialup)
10358ubl.unsubscore.com
9898all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9862dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8426bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
8071bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7127dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6587bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6537bl.spamcop.net
5851blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5810list.dnswl.org (not a blacklist!)
5187db.wpbl.info
4705blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
4530dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4478hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4260zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3929dnsbl.inps.de
3758wl.mailspike.net (union of all results) (not a blacklist!)
3582bl.score.senderscore.com
3146no-more-funn.moensted.dk (union of all results)
2537ix.dnsbl.manitu.net
2504hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2495ips.backscatterer.org
2448wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2253hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1706no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1693hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1419blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1396no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1308wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1225korea.services.net
1155bl.spamcannibal.org
823spamsources.fabel.dk
758mail-abuse.blacklist.jippg.org
659accredit.habeas.com (not a blacklist!)
584query.bondedsender.org (not a blacklist!)
470zen.spamhaus.org (union of SBL and SBLCSS results)
400zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
336l2.bbfh.ext.sorbs.net
335l1.bbfh.ext.sorbs.net
279aspews.ext.sorbs.net
260dnsbl.njabl.org (union of all results)
228iadb.isipp.com (not a blacklist!)
210tr.countries.nerd.dk
202dnsbl.njabl.org (result 127.0.0.9 = open proxy)
175dnsbl.ahbl.org (union of all results)
160hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
106iadb2.isipp.com (not a blacklist!)
92dnsbl.ahbl.org (result 127.0.0.4 = spam source)
74dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
70zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
52dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
52dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
52dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
39dnsbl.njabl.org (result 127.0.0.2 = open relay)
36no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
34hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
33no-more-funn.moensted.dk (result 127.0.0.9 = misc)
32tor.dnsbl.sectoor.de (union of all results)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
19dnsbl.njabl.org (result 127.0.0.4 = spam source)
19swl.spamhaus.org (union of all results) (not a blacklist!)
18dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
9spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
9dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
9spamguard.leadmon.net (union of all results)
8dnsbl-0.uceprotect.net
8swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
4multi.surbl.org
4no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
4blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3bl.deadbeef.com
2wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1multi.uribl.com (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
47263(total number of IP addresses whose names were tested, including 162 at SDSC)
25399hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20455hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15822(union of most domain zones)
12870abuse.rfc-ignorant.org
10672l1.apews.org
6002whois.rfc-ignorant.org (union of all results)
5060whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3435hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2501hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
943whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
258hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
199dbl.spamhaus.org (result 127.0.1.2 = spam source)
199dbl.spamhaus.org (union of all results)
192hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
173urired.spameatingmonkey.net
173hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
97hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
25postmaster.rfc-ignorant.org
24bogusmx.rfc-ignorant.org
17multi.surbl.org
17rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
10fresh.spameatingmonkey.net
9dob.sibl.support-intelligence.net
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1dsn.rfc-ignorant.org (zone not intended for this use)
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
16302(total number of domains tested, including 133 at SDSC)
14335hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3825(union of most domain zones)
3557hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1906hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1863hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1244whois.rfc-ignorant.org (union of all results)
1161abuse.rfc-ignorant.org
1136whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
635postmaster.rfc-ignorant.org
586hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
576dbl.spamhaus.org (result 127.0.1.2 = spam source)
576dbl.spamhaus.org (union of all results)
496l1.apews.org
477hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
411urired.spameatingmonkey.net
392multi.uribl.com (union of all results)
384multi.surbl.org
381multi.uribl.com (result 127.0.0.2 = spam resource)
284hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
271bogusmx.rfc-ignorant.org
189dsn.rfc-ignorant.org
108whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
91fresh.spameatingmonkey.net
80dob.sibl.support-intelligence.net
14rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 January 2012.