Blacklists Compared

14 May 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
50254(total number of IP addresses tested, including 161 at SDSC)
46971(union of most IP zones)
37733b.barracudacentral.org
36721l2.apews.org
35866zen.spamhaus.org (union of all results)
34028cbl.abuseat.org
34027zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29888hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28965bl.mailspike.net (union of all results)
26271dnsbl-1.uceprotect.net
23378zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22110dnsbl-2.uceprotect.net
21517dnsbl-3.uceprotect.net
18699hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18006bl.tiopan.com
17720bl.spameatingmonkey.net
17671blackholes.five-ten-sg.com (union of all results)
17418ddnsbl.internetdefensesystems.com
16344spam.dnsbl.sorbs.net
16136bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15667truncate.gbudb.net
14669psbl.surriel.com
13021bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13003dnsbl.sorbs.net (union of all results)
12349ubl.unsubscore.com
9313blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8595dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8586bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6780blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6382db.wpbl.info
5818list.dnswl.org (not a blacklist!)
5746bl.spamcop.net
5407bl.score.senderscore.com
5249no-more-funn.moensted.dk (union of all results)
5140dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4546hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4025wl.mailspike.net (union of all results) (not a blacklist!)
3673ips.backscatterer.org
3627ix.dnsbl.manitu.net
3613bl.mailspike.net (result 127.0.0.12 = bad reputation)
3136zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2919no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2817hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2793dnsbl.inps.de
2581hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2423wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2155no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1973korea.services.net
1694hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1594wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1542blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1358spamsources.fabel.dk
1306bl.spamcannibal.org
1076mail-abuse.blacklist.jippg.org
992zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
992zen.spamhaus.org (union of SBL and SBLCSS results)
916l2.bbfh.ext.sorbs.net
584accredit.habeas.com (not a blacklist!)
531query.bondedsender.org (not a blacklist!)
434aspews.ext.sorbs.net
377dnsbl.njabl.org (union of all results)
376l1.bbfh.ext.sorbs.net
282dnsbl.njabl.org (result 127.0.0.9 = open proxy)
276tr.countries.nerd.dk
199iadb2.isipp.com (not a blacklist!)
180iadb.isipp.com (not a blacklist!)
141dnsbl.ahbl.org (union of all results)
103hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
84no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
79dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
77no-more-funn.moensted.dk (result 127.0.0.9 = misc)
57dnsbl.njabl.org (result 127.0.0.2 = open relay)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
39no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
39dnsbl.ahbl.org (result 127.0.0.4 = spam source)
38dnsbl.njabl.org (result 127.0.0.4 = spam source)
37dnsbl.sorbs.net (result 127.0.0.6 = spam source)
34blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
26tor.dnsbl.sectoor.de (union of all results)
23tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
23dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
17swl.spamhaus.org (union of all results) (not a blacklist!)
11bl.deadbeef.com
9swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6multi.surbl.org
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl-0.uceprotect.net
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2multi.uribl.com (union of all results)
2spamguard.leadmon.net (union of all results)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
50254(total number of IP addresses whose names were tested, including 161 at SDSC)
28763hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23446hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18853(union of most domain zones)
16106abuse.rfc-ignorant.org
12956l1.apews.org
5949whois.rfc-ignorant.org (union of all results)
4758whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3664hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3068hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1193whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
446hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
305hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
243hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
217hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
183dbl.spamhaus.org (result 127.0.1.2 = spam source)
183dbl.spamhaus.org (union of all results)
177urired.spameatingmonkey.net
162hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
65multi.surbl.org
51postmaster.rfc-ignorant.org
40bogusmx.rfc-ignorant.org
29multi.uribl.com (result 127.0.0.2 = spam resource)
29multi.uribl.com (union of all results)
19fresh.spameatingmonkey.net
17rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7dsn.rfc-ignorant.org (zone not intended for this use)
6dob.sibl.support-intelligence.net
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
20124(total number of domains tested, including 138 at SDSC)
14708hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5728(union of most domain zones)
3720hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2302whois.rfc-ignorant.org (union of all results)
2163whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2161hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1900hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1365abuse.rfc-ignorant.org
1184dbl.spamhaus.org (result 127.0.1.2 = spam source)
1184dbl.spamhaus.org (union of all results)
1163hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
989hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
988multi.surbl.org
745multi.uribl.com (union of all results)
737multi.uribl.com (result 127.0.0.2 = spam resource)
705postmaster.rfc-ignorant.org
623l1.apews.org
474bogusmx.rfc-ignorant.org
468urired.spameatingmonkey.net
341hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
270dsn.rfc-ignorant.org
222rhsbl.ahbl.org
146fresh.spameatingmonkey.net
139whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
50hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
50dob.sibl.support-intelligence.net
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
5multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 May 2011.