Blacklists Compared

3 May 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
45788(total number of IP addresses tested, including 140 at SDSC)
40764(union of most IP zones)
34229b.barracudacentral.org
33465l2.apews.org
32323zen.spamhaus.org (union of all results)
30651cbl.abuseat.org
30648zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28523spam.dnsbl.sorbs.net
27477hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
27258dnsbl-1.uceprotect.net
27104ubl.unsubscore.com
24937psbl.surriel.com
24906bl.tiopan.com
23951bl.mailspike.net (union of all results)
22383bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
20879hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
17751zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
16917dnsbl.inps.de
16346dnsbl.sorbs.net (union of all results)
15172db.wpbl.info
14727bl.spameatingmonkey.net
11048all.spamrats.com (union of all results)
10115dnsbl-2.uceprotect.net
9341dnsbl-3.uceprotect.net
8314dnsbl.sorbs.net (result 127.0.0.6 = spam source)
8194bl.spamcop.net
8038all.spamrats.com (result 127.0.0.36 = dialup)
7060dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6295list.dnswl.org (not a blacklist!)
5817ix.dnsbl.manitu.net
5622wl.mailspike.net (union of all results) (not a blacklist!)
5405dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5178truncate.gbudb.net
3958bl.score.senderscore.com
3845zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3752ips.backscatterer.org
3279hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3193hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3088wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2918mail-abuse.blacklist.jippg.org
2810hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2687all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
1783bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1762hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1461wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1352all.s5h.net
1331zen.spamhaus.org (union of SBL and SBLCSS results)
1178bl.spamcannibal.org
1005wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
784accredit.habeas.com (not a blacklist!)
749zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
725query.bondedsender.org (not a blacklist!)
635spamsources.fabel.dk
598bl.mailspike.net (result 127.0.0.11 = very bad reputation)
582zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
576korea.services.net
525hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
520tr.countries.nerd.dk
417bl.mailspike.net (result 127.0.0.12 = bad reputation)
363all.spamrats.com (result 127.0.0.38 = spam source)
254free.v4bl.org
180iadb.isipp.com (not a blacklist!)
98iadb2.isipp.com (not a blacklist!)
91bl.mav.com.br
86dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
86dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
86dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
68wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
64tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
64tor.dnsbl.sectoor.de (union of all results)
31spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
31spamguard.leadmon.net (union of all results)
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
7multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl-0.uceprotect.net
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
45788(total number of IP addresses whose names were tested, including 140 at SDSC)
30965hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
26459hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14625l1.apews.org
3565hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2457hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1738(union of most domain zones)
670hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
650dbl.spamhaus.org (result 127.0.1.2 = spam source)
650dbl.spamhaus.org (union of all results)
498hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
292hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
210hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
51hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43multi.surbl.org
39multi.uribl.com (union of all results)
38multi.uribl.com (result 127.0.0.2 = spam resource)
28dob.sibl.support-intelligence.net
19urired.spameatingmonkey.net
15fresh.spameatingmonkey.net
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
36839(total number of domains tested, including 89 at SDSC)
28595hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4782hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4741(union of most domain zones)
3537hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2728dbl.spamhaus.org (result 127.0.1.2 = spam source)
2728dbl.spamhaus.org (union of all results)
2647hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1829hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1731multi.surbl.org
1599multi.uribl.com (union of all results)
1585multi.uribl.com (result 127.0.0.2 = spam resource)
1519hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
958l1.apews.org
330dob.sibl.support-intelligence.net
308hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
151urired.spameatingmonkey.net
129fresh.spameatingmonkey.net
94hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
30hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
16hostkarma.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)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 May 2014.