Blacklists Compared

26 April 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
36177(total number of IP addresses tested, including 151 at SDSC)
31575(union of most IP zones)
24926b.barracudacentral.org
23074zen.spamhaus.org (union of all results)
22092hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21142zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
21139cbl.abuseat.org
20200spam.dnsbl.sorbs.net
17958hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
17674dnsbl-1.uceprotect.net
17617ubl.unsubscore.com
16584bl.tiopan.com
15612psbl.surriel.com
15353bl.mailspike.net (union of all results)
13529bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12846zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12528dnsbl.sorbs.net (union of all results)
10867db.wpbl.info
10862dnsbl.inps.de
8302bl.spameatingmonkey.net
7973all.spamrats.com (union of all results)
7853dnsbl-2.uceprotect.net
7627dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7192bl.spamcop.net
6139list.dnswl.org (not a blacklist!)
6001dnsbl-3.uceprotect.net
5593all.spamrats.com (result 127.0.0.36 = dialup)
5470wl.mailspike.net (union of all results) (not a blacklist!)
4869ix.dnsbl.manitu.net
4402dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4319dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3701truncate.gbudb.net
3256bl.score.senderscore.com
3182hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3081wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2901ips.backscatterer.org
2762hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2725hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2248zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2216mail-abuse.blacklist.jippg.org
2086all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
1526zen.spamhaus.org (union of SBL and SBLCSS results)
1473wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1429bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1421hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1405l2.apews.org
1290bl.spamcannibal.org
975all.s5h.net
927zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
856wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
774bl.mailspike.net (result 127.0.0.12 = bad reputation)
743accredit.habeas.com (not a blacklist!)
679query.bondedsender.org (not a blacklist!)
661spamsources.fabel.dk
599zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
598korea.services.net
533bl.mailspike.net (result 127.0.0.11 = very bad reputation)
422tr.countries.nerd.dk
319all.spamrats.com (result 127.0.0.38 = spam source)
315hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
273free.v4bl.org
183iadb.isipp.com (not a blacklist!)
102iadb2.isipp.com (not a blacklist!)
91dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
91dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
91dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
91bl.mav.com.br
60wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
43spamguard.leadmon.net (union of all results)
42spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
38tor.dnsbl.sectoor.de (union of all results)
37tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
5multi.surbl.org
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4dnsbl-0.uceprotect.net
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
36177(total number of IP addresses whose names were tested, including 151 at SDSC)
23510hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19514hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2645hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2523(union of most domain zones)
2321hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1097hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
912dbl.spamhaus.org (result 127.0.1.2 = spam source)
912dbl.spamhaus.org (union of all results)
738hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
513l1.apews.org
360hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
150hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
121multi.uribl.com (result 127.0.0.2 = spam resource)
121multi.uribl.com (union of all results)
66multi.surbl.org
62hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
59dob.sibl.support-intelligence.net
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
23fresh.spameatingmonkey.net
16urired.spameatingmonkey.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
30469(total number of domains tested, including 96 at SDSC)
20452hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4194hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3963(union of most domain zones)
2838dbl.spamhaus.org (result 127.0.1.2 = spam source)
2838dbl.spamhaus.org (union of all results)
2628hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1925hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1750multi.surbl.org
1559hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1512multi.uribl.com (union of all results)
1498multi.uribl.com (result 127.0.0.2 = spam resource)
1458hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
791l1.apews.org
449dob.sibl.support-intelligence.net
213hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
176fresh.spameatingmonkey.net
109urired.spameatingmonkey.net
61hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
40hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.dnsbl.org
3multi.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 28 April 2014.