Blacklists Compared

24 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
56228(total number of IP addresses tested, including 152 at SDSC)
51547(union of most IP zones)
44474b.barracudacentral.org
42108zen.spamhaus.org (union of all results)
39928cbl.abuseat.org
39920zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
37341l2.apews.org
36272dnsbl-1.uceprotect.net
36025spam.dnsbl.sorbs.net
35666hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
35405ubl.unsubscore.com
35265hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
32373bl.tiopan.com
31786psbl.surriel.com
29359bl.mailspike.net (union of all results)
26643bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
22709zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22247dnsbl.sorbs.net (union of all results)
21205dnsbl.inps.de
16621db.wpbl.info
15964bl.spameatingmonkey.net
14717bl.spamcop.net
14638truncate.gbudb.net
14508dnsbl-2.uceprotect.net
13968all.spamrats.com (union of all results)
13736dnsbl.sorbs.net (result 127.0.0.6 = spam source)
12275dnsbl-3.uceprotect.net
10054all.spamrats.com (result 127.0.0.36 = dialup)
8850ix.dnsbl.manitu.net
8712dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6960bl.score.senderscore.com
6249dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6233list.dnswl.org (not a blacklist!)
5460wl.mailspike.net (union of all results) (not a blacklist!)
5171mail-abuse.blacklist.jippg.org
5046zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3718ips.backscatterer.org
3568hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3514wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3511all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3190hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2745hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2194hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2175bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1709zen.spamhaus.org (union of SBL and SBLCSS results)
1649wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1376bl.spamcannibal.org
1111zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1092bl.mailspike.net (result 127.0.0.11 = very bad reputation)
998spamsources.fabel.dk
845bl.mailspike.net (result 127.0.0.12 = bad reputation)
776free.v4bl.org
721accredit.habeas.com (not a blacklist!)
719all.s5h.net
655query.bondedsender.org (not a blacklist!)
628korea.services.net
598zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
568tr.countries.nerd.dk
443all.spamrats.com (result 127.0.0.38 = spam source)
320hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
248wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
162iadb.isipp.com (not a blacklist!)
101bl.mav.com.br
97dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
97dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
97dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
77iadb2.isipp.com (not a blacklist!)
49wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
48tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
48tor.dnsbl.sectoor.de (union of all results)
12spamguard.leadmon.net (union of all results)
11spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
9multi.surbl.org
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
56228(total number of IP addresses whose names were tested, including 152 at SDSC)
36406hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
30730hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15737l1.apews.org
3742hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2346hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1868(union of most domain zones)
838dbl.spamhaus.org (result 127.0.1.2 = spam source)
838dbl.spamhaus.org (union of all results)
776hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
427hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
383hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
219hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
199hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
73dob.sibl.support-intelligence.net
61multi.surbl.org
55fresh.spameatingmonkey.net
50multi.uribl.com (result 127.0.0.2 = spam resource)
50multi.uribl.com (union of all results)
33urired.spameatingmonkey.net
15hostkarma.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
44171(total number of domains tested, including 107 at SDSC)
36337hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5577(union of most domain zones)
5163hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4175hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
3825hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3766dbl.spamhaus.org (result 127.0.1.2 = spam source)
3766dbl.spamhaus.org (union of all results)
2429multi.surbl.org
2404multi.uribl.com (union of all results)
2393multi.uribl.com (result 127.0.0.2 = spam resource)
1651hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1620hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
899dob.sibl.support-intelligence.net
351l1.apews.org
241hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
191fresh.spameatingmonkey.net
104urired.spameatingmonkey.net
40hostkarma.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)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.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 27 May 2014.