Blacklists Compared

7 August 2010

[ 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, and wl.mailspike.net zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
214371(total number of IP addresses tested, including 172 at SDSC)
211350(union of most IP zones)
198980zen.spamhaus.org (union of all results)
188319b.barracudacentral.org
172043cbl.abuseat.org
171933zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
148149hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
146224bl.spameatingmonkey.net
144117dnsbl-1.uceprotect.net
141984psbl.surriel.com
139242dnsbl-2.uceprotect.net
135801dnsbl-3.uceprotect.net
132343bl.mailspike.net (union of all results)
126316ubl.unsubscore.com
116823zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
106995dnsbl.sorbs.net (union of all results)
95085bl.tiopan.com
88208hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
84178spam.dnsbl.sorbs.net
72324bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
68494dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
61362blackholes.five-ten-sg.com (union of all results)
58650bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
55177bl.score.senderscore.com
53266dnsbl.sorbs.net (result 127.0.0.10 = dialup)
52013bl.spamcop.net
50717blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
43126db.wpbl.info
41506zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31316ix.dnsbl.manitu.net
27031bl.mailspike.net (result 127.0.0.11 = very bad reputation)
26054no-more-funn.moensted.dk (union of all results)
24128mail-abuse.blacklist.jippg.org
22664dnsbl.inps.de
19942no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19612bl.mailspike.net (result 127.0.0.12 = bad reputation)
13462hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9445blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
8691dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7112dnsbl.ahbl.org (union of all results)
5833dnsbl.ahbl.org (result 127.0.0.4 = spam source)
5778no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5190bl.spamcannibal.org
4935ips.backscatterer.org
4842korea.services.net
4151spamsources.fabel.dk
4075list.dnswl.org (not a blacklist!)
3597hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3069wl.mailspike.net (union of all results) (not a blacklist!)
2007wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1997dnsbl.njabl.org (union of all results)
1931tr.countries.nerd.dk
1884hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1760dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1223dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1157blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1015wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
842hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
533accredit.habeas.com (not a blacklist!)
438aspews.ext.sorbs.net
429query.bondedsender.org (not a blacklist!)
407zen.spamhaus.org (union of SBL and SBLCSS results)
405zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
302no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
188tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
188tor.dnsbl.sectoor.de (union of all results)
178l2.bbfh.ext.sorbs.net
169dnsbl.njabl.org (result 127.0.0.2 = open relay)
149no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
111iadb2.isipp.com (not a blacklist!)
99hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
84l1.bbfh.ext.sorbs.net
79iadb.isipp.com (not a blacklist!)
69no-more-funn.moensted.dk (result 127.0.0.9 = misc)
68dnsbl.njabl.org (result 127.0.0.4 = spam source)
56dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
55bl.deadbeef.com
47wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
42blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
18spamguard.leadmon.net (union of all results)
15spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10dnsbl-0.uceprotect.net
6multi.surbl.org
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
2zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
214371(total number of IP addresses whose names were tested, including 172 at SDSC)
134337hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
121279hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
105117(union of most domain zones)
86229abuse.rfc-ignorant.org
36206whois.rfc-ignorant.org (union of all results)
25805whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13711hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10401whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5160hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4281hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
578hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
522dbl.spamhaus.org
429urired.spameatingmonkey.net
346hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
298hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
122hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
64rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
64rhsbl.sorbs.net (union of all results)
59postmaster.rfc-ignorant.org
39rhsbl.ahbl.org
36dsn.rfc-ignorant.org (zone not intended for this use)
35multi.uribl.com (result 127.0.0.2 = spam resource)
35multi.uribl.com (union of all results)
32bogusmx.rfc-ignorant.org
21multi.surbl.org
16dob.sibl.support-intelligence.net
15fresh.spameatingmonkey.net
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3bl.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
68212(total number of domains tested, including 156 at SDSC)
62777hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14070(union of most domain zones)
9083hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5511abuse.rfc-ignorant.org
4084whois.rfc-ignorant.org (union of all results)
3645whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3076hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2991urired.spameatingmonkey.net
2915hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1773postmaster.rfc-ignorant.org
1472hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1454dbl.spamhaus.org
1233multi.surbl.org
794bogusmx.rfc-ignorant.org
719multi.uribl.com (union of all results)
709multi.uribl.com (result 127.0.0.2 = spam resource)
671hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
653hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
439whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
347dsn.rfc-ignorant.org
64fresh.spameatingmonkey.net
54dob.sibl.support-intelligence.net
36hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
26rhsbl.sorbs.net (union of all results)
16rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
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
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 August 2010.