Blacklists Compared

15 February 2014

[ 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
60794(total number of IP addresses tested, including 149 at SDSC)
55231(union of most IP zones)
48526b.barracudacentral.org
46764zen.spamhaus.org (union of all results)
45846l2.apews.org
42621cbl.abuseat.org
42618zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
41651spam.dnsbl.sorbs.net
37950bl.tiopan.com
37564hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37276dnsbl-1.uceprotect.net
36319ubl.unsubscore.com
31169hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30078psbl.surriel.com
28129bl.mailspike.net (union of all results)
27773zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
26084dnsbl.sorbs.net (union of all results)
23969bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
22614bl.spameatingmonkey.net
22284db.wpbl.info
21801dnsbl.inps.de
17823dnsbl-2.uceprotect.net
15436all.spamrats.com (union of all results)
15274dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14785dnsbl-3.uceprotect.net
14086bl.spamcop.net
10940all.spamrats.com (result 127.0.0.36 = dialup)
10666truncate.gbudb.net
10640dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7839dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6070list.dnswl.org (not a blacklist!)
5874zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5827bl.score.senderscore.com
4990wl.mailspike.net (union of all results) (not a blacklist!)
4662ips.backscatterer.org
4255all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3716hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3234wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3229hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3224ix.dnsbl.manitu.net
2400hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1908bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1831bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1589hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1494bl.spamcannibal.org
1439bl.mailspike.net (result 127.0.0.12 = bad reputation)
1372spamsources.fabel.dk
1371wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1290all.s5h.net
1004zen.spamhaus.org (union of SBL and SBLCSS results)
863tr.countries.nerd.dk
763accredit.habeas.com (not a blacklist!)
687query.bondedsender.org (not a blacklist!)
662korea.services.net
562zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
519hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
442zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
339free.v4bl.org
296wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
295mail-abuse.blacklist.jippg.org
284all.spamrats.com (result 127.0.0.38 = spam source)
185iadb.isipp.com (not a blacklist!)
110bl.mav.com.br
95iadb2.isipp.com (not a blacklist!)
89wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
71dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
71dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
71dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
63dnsbl.ahbl.org (union of all results)
62tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
62tor.dnsbl.sectoor.de (union of all results)
52dnsbl.ahbl.org (result 127.0.0.4 = spam source)
10dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
7multi.uribl.com (union of all results)
7spamguard.leadmon.net (union of all results)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
5multi.surbl.org
3dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment 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
60794(total number of IP addresses whose names were tested, including 149 at SDSC)
38632hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
32256hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19489l1.apews.org
4443hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2512hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1641(union of most domain zones)
667hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
592dbl.spamhaus.org (result 127.0.1.2 = spam source)
592dbl.spamhaus.org (union of all results)
358hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
315hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
238hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
83hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
63multi.uribl.com (result 127.0.0.2 = spam resource)
63multi.uribl.com (union of all results)
51multi.surbl.org
38rhsbl.ahbl.org
27fresh.spameatingmonkey.net
22urired.spameatingmonkey.net
18dob.sibl.support-intelligence.net
16hostkarma.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
45265(total number of domains tested, including 103 at SDSC)
35737hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7208(union of most domain zones)
5744hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
5366hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2727dbl.spamhaus.org (result 127.0.1.2 = spam source)
2727dbl.spamhaus.org (union of all results)
2518hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1553hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1355hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1149multi.uribl.com (union of all results)
1137multi.uribl.com (result 127.0.0.2 = spam resource)
1100multi.surbl.org
1063l1.apews.org
395dob.sibl.support-intelligence.net
352fresh.spameatingmonkey.net
192hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
96urired.spameatingmonkey.net
34rhsbl.ahbl.org
27hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3ex.dnsbl.org
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)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 February 2014.