Blacklists Compared

25 June 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
49661(total number of IP addresses tested, including 173 at SDSC)
46559(union of most IP zones)
37690b.barracudacentral.org
37516l2.apews.org
36228zen.spamhaus.org (union of all results)
34783cbl.abuseat.org
34782zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29963hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
29369bl.mailspike.net (union of all results)
27776dnsbl-1.uceprotect.net
23772spam.dnsbl.sorbs.net
22717zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22682dnsbl-2.uceprotect.net
22458dnsbl-3.uceprotect.net
18764bl.tiopan.com
18753ddnsbl.internetdefensesystems.com
18178bl.spameatingmonkey.net
18128hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17729truncate.gbudb.net
17062blackholes.five-ten-sg.com (union of all results)
16091dnsbl.sorbs.net (union of all results)
15955psbl.surriel.com
15589bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
14043bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11609ubl.unsubscore.com
11466bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9322blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8878dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6670db.wpbl.info
6282bl.score.senderscore.com
6157blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6151bl.spamcop.net
5602list.dnswl.org (not a blacklist!)
4933no-more-funn.moensted.dk (union of all results)
4915dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4795dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4754zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4138hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4060wl.mailspike.net (union of all results) (not a blacklist!)
3619ix.dnsbl.manitu.net
3223bl.mailspike.net (result 127.0.0.12 = bad reputation)
3103dnsbl.inps.de
2759hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2714no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2636ips.backscatterer.org
2601hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2414wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2104no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1750korea.services.net
1634wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1553blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1452hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1331bl.spamcannibal.org
1246spamsources.fabel.dk
1148mail-abuse.blacklist.jippg.org
581accredit.habeas.com (not a blacklist!)
543query.bondedsender.org (not a blacklist!)
419dnsbl.njabl.org (union of all results)
358zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
358zen.spamhaus.org (union of SBL and SBLCSS results)
346aspews.ext.sorbs.net
311dnsbl.njabl.org (result 127.0.0.9 = open proxy)
292l2.bbfh.ext.sorbs.net
268tr.countries.nerd.dk
248dnsbl.ahbl.org (union of all results)
228iadb2.isipp.com (not a blacklist!)
205iadb.isipp.com (not a blacklist!)
163dnsbl.ahbl.org (result 127.0.0.4 = spam source)
134l1.bbfh.ext.sorbs.net
69dnsbl.njabl.org (result 127.0.0.2 = open relay)
66dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
64dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
64dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
64dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
59hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
51no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
42no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
39dnsbl.njabl.org (result 127.0.0.4 = spam source)
39no-more-funn.moensted.dk (result 127.0.0.9 = misc)
37tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
37tor.dnsbl.sectoor.de (union of all results)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
19dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
16swl.spamhaus.org (union of all results) (not a blacklist!)
13bl.deadbeef.com
12wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
10swl.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!)
6multi.surbl.org
3spamguard.leadmon.net (union of all results)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
49661(total number of IP addresses whose names were tested, including 173 at SDSC)
28098hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
22681hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18316(union of most domain zones)
15487abuse.rfc-ignorant.org
13082l1.apews.org
5944whois.rfc-ignorant.org (union of all results)
4732whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3636hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2868hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1214whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
364hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
357hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
295hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
214hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
185urired.spameatingmonkey.net
171dbl.spamhaus.org (result 127.0.1.2 = spam source)
171dbl.spamhaus.org (union of all results)
96hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40postmaster.rfc-ignorant.org
35dob.sibl.support-intelligence.net
33fresh.spameatingmonkey.net
30bogusmx.rfc-ignorant.org
20rhsbl.ahbl.org
17multi.surbl.org
17multi.uribl.com (union of all results)
16multi.uribl.com (result 127.0.0.2 = spam resource)
6dsn.rfc-ignorant.org (zone not intended for this use)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.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
28022(total number of domains tested, including 156 at SDSC)
22788hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7338(union of most domain zones)
4026hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4014whois.rfc-ignorant.org (union of all results)
3865whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2363hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2329hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1535abuse.rfc-ignorant.org
940hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
819postmaster.rfc-ignorant.org
663bogusmx.rfc-ignorant.org
646l1.apews.org
598urired.spameatingmonkey.net
510hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
402hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
400dbl.spamhaus.org (result 127.0.1.2 = spam source)
400dbl.spamhaus.org (union of all results)
318dsn.rfc-ignorant.org
263multi.uribl.com (union of all results)
254multi.uribl.com (result 127.0.0.2 = spam resource)
245multi.surbl.org
149whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
114dob.sibl.support-intelligence.net
97fresh.spameatingmonkey.net
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14rhsbl.ahbl.org
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 27 June 2011.