Blacklists Compared

10 December 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
48142(total number of IP addresses tested, including 234 at SDSC)
45092(union of most IP zones)
35627l2.apews.org
35616b.barracudacentral.org
33986zen.spamhaus.org (union of all results)
31821cbl.abuseat.org
31819zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28242ip.v4bl.org
22840hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22471spam.dnsbl.sorbs.net
21624zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
21243dnsbl.sorbs.net (union of all results)
21087bl.tiopan.com
20008dnsbl-1.uceprotect.net
18259bl.mailspike.net (union of all results)
17568dnsbl-3.uceprotect.net
17225dnsbl-2.uceprotect.net
15876truncate.gbudb.net
15584hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14252bl.spameatingmonkey.net
14060blackholes.five-ten-sg.com (union of all results)
13271dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12647psbl.surriel.com
9810bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8891ix.dnsbl.manitu.net
8826ubl.unsubscore.com
8045dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7290bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6568list.dnswl.org (not a blacklist!)
6403blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5888blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5556bl.spamcop.net
5299dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5113db.wpbl.info
4928hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4592zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4318no-more-funn.moensted.dk (union of all results)
4202wl.mailspike.net (union of all results) (not a blacklist!)
3426dnsbl.inps.de
3337bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3058ips.backscatterer.org
2938bl.score.senderscore.com
2738wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2715hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2643hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2248no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1851hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1801no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1756blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1457wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1326korea.services.net
1187bl.spamcannibal.org
951spamsources.fabel.dk
822mail-abuse.blacklist.jippg.org
711accredit.habeas.com (not a blacklist!)
661query.bondedsender.org (not a blacklist!)
469zen.spamhaus.org (union of SBL and SBLCSS results)
342dnsbl.njabl.org (union of all results)
339l2.bbfh.ext.sorbs.net
332zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
315aspews.ext.sorbs.net
270dnsbl.njabl.org (result 127.0.0.9 = open proxy)
248l1.bbfh.ext.sorbs.net
243tr.countries.nerd.dk
215dnsbl.ahbl.org (union of all results)
206iadb.isipp.com (not a blacklist!)
200hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
143no-more-funn.moensted.dk (result 127.0.0.9 = misc)
137zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
116iadb2.isipp.com (not a blacklist!)
115dnsbl.ahbl.org (result 127.0.0.4 = spam source)
79no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
71dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
62no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
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)
42dnsbl.njabl.org (result 127.0.0.2 = open relay)
37spamguard.leadmon.net (union of all results)
36tor.dnsbl.sectoor.de (union of all results)
35spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
30dnsbl.njabl.org (result 127.0.0.4 = spam source)
29dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21swl.spamhaus.org (union of all results) (not a blacklist!)
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
9dnsbl-0.uceprotect.net
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8bl.deadbeef.com
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4multi.surbl.org
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
48142(total number of IP addresses whose names were tested, including 234 at SDSC)
26707hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21589hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16759(union of most domain zones)
13471abuse.rfc-ignorant.org
11074l1.apews.org
6243whois.rfc-ignorant.org (union of all results)
5256whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3780hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2748hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
988whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
420hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
353dbl.spamhaus.org (result 127.0.1.2 = spam source)
353dbl.spamhaus.org (union of all results)
263hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
257hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
197hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
185urired.spameatingmonkey.net
98hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
35postmaster.rfc-ignorant.org
28fresh.spameatingmonkey.net
27bogusmx.rfc-ignorant.org
26rhsbl.ahbl.org
21multi.uribl.com (result 127.0.0.2 = spam resource)
21multi.uribl.com (union of all results)
20multi.surbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7dob.sibl.support-intelligence.net
6dsn.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
19061(total number of domains tested, including 225 at SDSC)
16336hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5056(union of most domain zones)
3963hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2083hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1996hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1944whois.rfc-ignorant.org (union of all results)
1827whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1512abuse.rfc-ignorant.org
784postmaster.rfc-ignorant.org
692dbl.spamhaus.org (result 127.0.1.2 = spam source)
692dbl.spamhaus.org (union of all results)
638hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
637hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
624l1.apews.org
466urired.spameatingmonkey.net
441bogusmx.rfc-ignorant.org
435multi.surbl.org
399multi.uribl.com (union of all results)
384multi.uribl.com (result 127.0.0.2 = spam resource)
305hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
265dsn.rfc-ignorant.org
117whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
103fresh.spameatingmonkey.net
43dob.sibl.support-intelligence.net
18rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10ex.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)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 December 2011.