Blacklists Compared

24 July 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
218046(total number of IP addresses tested, including 179 at SDSC)
214992(union of most IP zones)
202623zen.spamhaus.org (union of all results)
185822b.barracudacentral.org
182045l2.apews.org
180603cbl.abuseat.org
180562zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
155088hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
150799dnsbl-1.uceprotect.net
147316psbl.surriel.com
145519bl.spameatingmonkey.net
142635dnsbl-2.uceprotect.net
138846dnsbl-3.uceprotect.net
132799bl.mailspike.net (union of all results)
132442ubl.unsubscore.com
118580zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
107654dnsbl.sorbs.net (union of all results)
92676bl.tiopan.com
88718hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
80046spam.dnsbl.sorbs.net
71520bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
65005dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
64345bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
59084blackholes.five-ten-sg.com (union of all results)
57859bl.score.senderscore.com
55358dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50995bl.spamcop.net
48500blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
48232db.wpbl.info
41290zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
30331ix.dnsbl.manitu.net
27196no-more-funn.moensted.dk (union of all results)
22935mail-abuse.blacklist.jippg.org
22414bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20756no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
20566dnsbl.inps.de
20137bl.mailspike.net (result 127.0.0.12 = bad reputation)
15411hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9301blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7484dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6122dnsbl.ahbl.org (union of all results)
6079no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5815korea.services.net
5589bl.spamcannibal.org
4640dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4277list.dnswl.org (not a blacklist!)
4112spamsources.fabel.dk
3581hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3475ips.backscatterer.org
2781wl.mailspike.net (union of all results) (not a blacklist!)
2167dnsbl.njabl.org (union of all results)
1955hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1934dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1826tr.countries.nerd.dk
1798wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1413dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1258blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
981hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
940wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
641zen.spamhaus.org (union of SBL and SBLCSS results)
635zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
489accredit.habeas.com (not a blacklist!)
426aspews.ext.sorbs.net
391query.bondedsender.org (not a blacklist!)
295no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
221l2.bbfh.ext.sorbs.net
159dnsbl.njabl.org (result 127.0.0.2 = open relay)
157tor.dnsbl.sectoor.de (union of all results)
156tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
155no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
125iadb2.isipp.com (not a blacklist!)
100hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
93iadb.isipp.com (not a blacklist!)
84no-more-funn.moensted.dk (result 127.0.0.9 = misc)
74dnsbl.njabl.org (result 127.0.0.4 = spam source)
69dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
57bl.deadbeef.com
55l1.bbfh.ext.sorbs.net
43wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
17dnsbl-0.uceprotect.net
16spamguard.leadmon.net (union of all results)
13spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
6zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.surbl.org
4multi.uribl.com (union of all results)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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
218046(total number of IP addresses whose names were tested, including 179 at SDSC)
138883hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
126071hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
107984(union of most domain zones)
96913l1.apews.org
89353abuse.rfc-ignorant.org
36414whois.rfc-ignorant.org (union of all results)
25400whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13382hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
11014whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5415hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4327hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
562hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
514dbl.spamhaus.org
342urired.spameatingmonkey.net
290hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
204hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
173hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
66postmaster.rfc-ignorant.org
64rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
64rhsbl.sorbs.net (union of all results)
43dsn.rfc-ignorant.org (zone not intended for this use)
39bogusmx.rfc-ignorant.org
35rhsbl.ahbl.org
28multi.uribl.com (result 127.0.0.2 = spam resource)
28multi.uribl.com (union of all results)
26fresh.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
15multi.surbl.org
12dob.sibl.support-intelligence.net
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
58188(total number of domains tested, including 164 at SDSC)
55213hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10551(union of most domain zones)
6072hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3170whois.rfc-ignorant.org (union of all results)
2925whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2914urired.spameatingmonkey.net
2825abuse.rfc-ignorant.org
2626hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2621hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1783postmaster.rfc-ignorant.org
1467hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1298dbl.spamhaus.org
1207multi.surbl.org
1142l1.apews.org
874hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
793bogusmx.rfc-ignorant.org
606multi.uribl.com (union of all results)
594multi.uribl.com (result 127.0.0.2 = spam resource)
540hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
342dsn.rfc-ignorant.org
245whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
47rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
22hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5dob.sibl.support-intelligence.net
3fresh.spameatingmonkey.net
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 30 July 2010.