Blacklists Compared

27 August 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
51837(total number of IP addresses tested, including 159 at SDSC)
48596(union of most IP zones)
40409b.barracudacentral.org
40269l2.apews.org
38746zen.spamhaus.org (union of all results)
37137cbl.abuseat.org
37136zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
32044hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
31267bl.mailspike.net (union of all results)
27399dnsbl-1.uceprotect.net
26679dnsbl-3.uceprotect.net
26647dnsbl-2.uceprotect.net
25583zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
23839hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21003ddnsbl.internetdefensesystems.com
20328bl.tiopan.com
19567bl.spameatingmonkey.net
19529spam.dnsbl.sorbs.net
18941truncate.gbudb.net
18259blackholes.five-ten-sg.com (union of all results)
18132ubl.unsubscore.com
15352psbl.surriel.com
14460bl.mailspike.net (result 127.0.0.11 = very bad reputation)
14155dnsbl.sorbs.net (union of all results)
13905bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13185bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9662blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
9507dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7009blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6986db.wpbl.info
6272bl.spamcop.net
5539zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5419list.dnswl.org (not a blacklist!)
5246bl.score.senderscore.com
5150dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4419no-more-funn.moensted.dk (union of all results)
4176ix.dnsbl.manitu.net
3744wl.mailspike.net (union of all results) (not a blacklist!)
3538dnsbl.inps.de
3358hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3121bl.mailspike.net (result 127.0.0.12 = bad reputation)
2564hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2484wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2281ips.backscatterer.org
2257hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2227no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1999no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1587hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1576blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1379korea.services.net
1278bl.spamcannibal.org
1251wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1152spamsources.fabel.dk
1087mail-abuse.blacklist.jippg.org
641dnsbl.sorbs.net (result 127.0.0.6 = spam source)
512accredit.habeas.com (not a blacklist!)
484query.bondedsender.org (not a blacklist!)
377dnsbl.njabl.org (union of all results)
305zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
305zen.spamhaus.org (union of SBL and SBLCSS results)
289aspews.ext.sorbs.net
284dnsbl.njabl.org (result 127.0.0.9 = open proxy)
263tr.countries.nerd.dk
261dnsbl.ahbl.org (union of all results)
235iadb2.isipp.com (not a blacklist!)
211iadb.isipp.com (not a blacklist!)
164hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
145dnsbl.ahbl.org (result 127.0.0.4 = spam source)
92no-more-funn.moensted.dk (result 127.0.0.9 = misc)
92l2.bbfh.ext.sorbs.net
87no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
83dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
65dnsbl.njabl.org (result 127.0.0.2 = open relay)
60dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
60dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
60dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
37no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
33dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
31l1.bbfh.ext.sorbs.net
30tor.dnsbl.sectoor.de (union of all results)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28dnsbl.njabl.org (result 127.0.0.4 = spam source)
20swl.spamhaus.org (union of all results) (not a blacklist!)
15bl.deadbeef.com
12blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5multi.surbl.org
3swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl-0.uceprotect.net
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)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
51837(total number of IP addresses whose names were tested, including 159 at SDSC)
27381hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21704hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18952(union of most domain zones)
15288abuse.rfc-ignorant.org
12251l1.apews.org
8011whois.rfc-ignorant.org (union of all results)
6960whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4377hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2844hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1054whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
427hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
236dbl.spamhaus.org (result 127.0.1.2 = spam source)
236dbl.spamhaus.org (union of all results)
235hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
222hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
171urired.spameatingmonkey.net
164hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
150hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
50postmaster.rfc-ignorant.org
38bogusmx.rfc-ignorant.org
25multi.surbl.org
25fresh.spameatingmonkey.net
22rhsbl.ahbl.org
14dob.sibl.support-intelligence.net
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5dsn.rfc-ignorant.org (zone not intended for this use)
2bl.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
27888(total number of domains tested, including 115 at SDSC)
22731hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7103(union of most domain zones)
4379hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3731whois.rfc-ignorant.org (union of all results)
3576whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2209hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2155hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1732abuse.rfc-ignorant.org
1588hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
929l1.apews.org
784postmaster.rfc-ignorant.org
615hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
559bogusmx.rfc-ignorant.org
557dbl.spamhaus.org (result 127.0.1.2 = spam source)
557dbl.spamhaus.org (union of all results)
498urired.spameatingmonkey.net
376multi.surbl.org
376multi.uribl.com (union of all results)
366multi.uribl.com (result 127.0.0.2 = spam resource)
312hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
268dsn.rfc-ignorant.org
155whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
88fresh.spameatingmonkey.net
52dob.sibl.support-intelligence.net
24hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19rhsbl.ahbl.org
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 August 2011.