Blacklists Compared

2 October 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
145236(total number of IP addresses tested, including 176 at SDSC)
142118(union of most IP zones)
133066b.barracudacentral.org
130885zen.spamhaus.org (union of all results)
121188zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
121175cbl.abuseat.org
105637hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
101486dnsbl-1.uceprotect.net
93526dnsbl-2.uceprotect.net
92173dnsbl-3.uceprotect.net
90874bl.mailspike.net (union of all results)
86910zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
86807bl.tiopan.com
85389psbl.surriel.com
82055bl.spameatingmonkey.net
60119dnsbl.sorbs.net (union of all results)
55855bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
53690hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
51743l2.apews.org
47165blackholes.five-ten-sg.com (union of all results)
42731bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
41315spam.dnsbl.sorbs.net
38977dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
32710bl.score.senderscore.com
31717blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31046ubl.unsubscore.com
30624db.wpbl.info
28403bl.spamcop.net
26965dnsbl.sorbs.net (result 127.0.0.10 = dialup)
20243zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
19615bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15211no-more-funn.moensted.dk (union of all results)
14947dnsbl.inps.de
14935ix.dnsbl.manitu.net
14131blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
13885mail-abuse.blacklist.jippg.org
13189hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12539bl.mailspike.net (result 127.0.0.12 = bad reputation)
10852no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5793dnsbl.ahbl.org (union of all results)
5226ips.backscatterer.org
5217dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4757wl.mailspike.net (union of all results) (not a blacklist!)
4274list.dnswl.org (not a blacklist!)
3769bl.spamcannibal.org
3684no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3195hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3144wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2831spamsources.fabel.dk
2668korea.services.net
2468hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2327hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1339wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1326dnsbl.njabl.org (union of all results)
1294blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1132dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1036tr.countries.nerd.dk
874l2.bbfh.ext.sorbs.net
563aspews.ext.sorbs.net
542accredit.habeas.com (not a blacklist!)
494dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
471no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
454query.bondedsender.org (not a blacklist!)
363l1.bbfh.ext.sorbs.net
273wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
246zen.spamhaus.org (union of SBL and SBLCSS results)
243zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
200no-more-funn.moensted.dk (result 127.0.0.9 = misc)
139iadb2.isipp.com (not a blacklist!)
132tor.dnsbl.sectoor.de (union of all results)
131tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
116iadb.isipp.com (not a blacklist!)
106dnsbl.njabl.org (result 127.0.0.2 = open relay)
94hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
88dnsbl.njabl.org (result 127.0.0.4 = spam source)
88no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
82dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
32bl.deadbeef.com
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17spamguard.leadmon.net (union of all results)
14spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
10dnsbl.sorbs.net (result 127.0.0.6 = spam source)
9zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
6dnsbl-0.uceprotect.net
4multi.surbl.org
3zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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
145236(total number of IP addresses whose names were tested, including 176 at SDSC)
83821hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
71483hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
65435(union of most domain zones)
56001abuse.rfc-ignorant.org
27226l1.apews.org
24989whois.rfc-ignorant.org (union of all results)
19577whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8664hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
5412whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3861hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1956hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
613hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
544urired.spameatingmonkey.net
459dbl.spamhaus.org
350hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
239hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
87hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
67rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
67rhsbl.sorbs.net (union of all results)
61postmaster.rfc-ignorant.org
52rhsbl.ahbl.org
47fresh.spameatingmonkey.net
42dob.sibl.support-intelligence.net
40dsn.rfc-ignorant.org (zone not intended for this use)
38bogusmx.rfc-ignorant.org
21multi.uribl.com (result 127.0.0.2 = spam resource)
21multi.uribl.com (union of all results)
19multi.surbl.org
17hostkarma.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
55462(total number of domains tested, including 164 at SDSC)
32766hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14266(union of most domain zones)
14242hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
10888hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7713abuse.rfc-ignorant.org
3743whois.rfc-ignorant.org (union of all results)
3224whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3209hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2664hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2138urired.spameatingmonkey.net
1840hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1527dbl.spamhaus.org
1361postmaster.rfc-ignorant.org
1163multi.surbl.org
714bogusmx.rfc-ignorant.org
519whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
485multi.uribl.com (union of all results)
475multi.uribl.com (result 127.0.0.2 = spam resource)
371hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
262dsn.rfc-ignorant.org
165hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
65dob.sibl.support-intelligence.net
51fresh.spameatingmonkey.net
30hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
29rhsbl.ahbl.org
27hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15ex.dnsbl.org
10rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
10rhsbl.sorbs.net (union of all results)
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 6 October 2010.