Blacklists Compared

8 December 2012

[ 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
36104(total number of IP addresses tested, including 158 at SDSC)
31073(union of most IP zones)
23437l2.apews.org
22885b.barracudacentral.org
22537zen.spamhaus.org (union of all results)
21377ip.v4bl.org
20925cbl.abuseat.org
20923zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
20228bl.tiopan.com
16313hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
16145hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13529zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
13198bl.mailspike.net (union of all results)
13093dnsbl-1.uceprotect.net
11280bl.mailspike.net (result 127.0.0.12 = bad reputation)
10939wl.mailspike.net (union of all results) (not a blacklist!)
9986dnsbl.sorbs.net (union of all results)
9596psbl.surriel.com
9456ubl.unsubscore.com
9267dnsbl-2.uceprotect.net
8873all.spamrats.com (union of all results)
8467dnsbl-3.uceprotect.net
7280dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7263spam.dnsbl.sorbs.net
7135dnsbl.inps.de
6937list.dnswl.org (not a blacklist!)
6872bl.spameatingmonkey.net
6588wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5997db.wpbl.info
4560all.spamrats.com (result 127.0.0.36 = dialup)
3981all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3412wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3305dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3228truncate.gbudb.net
2857hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2741hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2734free.v4bl.org
2669bl.spamcop.net
2255zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1987bl.score.senderscore.com
1781hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1727all.s5h.net
1720ix.dnsbl.manitu.net
1717ips.backscatterer.org
1563bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1393hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1381bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1347zen.spamhaus.org (union of SBL and SBLCSS results)
1124bl.spamcannibal.org
870zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
825accredit.habeas.com (not a blacklist!)
676query.bondedsender.org (not a blacklist!)
637spamsources.fabel.dk
618wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
518korea.services.net
496mail-abuse.blacklist.jippg.org
477zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
475tr.countries.nerd.dk
367all.spamrats.com (result 127.0.0.38 = spam source)
321wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
304l2.bbfh.ext.sorbs.net
289iadb.isipp.com (not a blacklist!)
261aspews.ext.sorbs.net
153iadb2.isipp.com (not a blacklist!)
146dnsbl.ahbl.org (union of all results)
144dnsbl.njabl.org (union of all results)
115hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
112dnsbl.ahbl.org (result 127.0.0.4 = spam source)
99dnsbl.njabl.org (result 127.0.0.9 = open proxy)
88bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
27dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
27dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
27dnsbl.njabl.org (result 127.0.0.2 = open relay)
25tor.dnsbl.sectoor.de (union of all results)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
20dnsbl.sorbs.net (result 127.0.0.6 = spam source)
18dnsbl.njabl.org (result 127.0.0.4 = spam source)
12dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
8multi.surbl.org
5dnsbl-0.uceprotect.net
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (union of all results)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1multi.uribl.com (union of all results)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
36104(total number of IP addresses whose names were tested, including 158 at SDSC)
19340hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15799hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5435l1.apews.org
2845hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2485hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1596(union of most domain zones)
468hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
453dbl.spamhaus.org (result 127.0.1.2 = spam source)
453dbl.spamhaus.org (union of all results)
450hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
248hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
149urired.spameatingmonkey.net
146hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
84hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
49multi.uribl.com (union of all results)
48multi.uribl.com (result 127.0.0.2 = spam resource)
27multi.surbl.org
22rhsbl.ahbl.org
19fresh.spameatingmonkey.net
11dob.sibl.support-intelligence.net
10hostkarma.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
20427(total number of domains tested, including 99 at SDSC)
17778hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3911hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3535(union of most domain zones)
2478hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2464dbl.spamhaus.org (union of all results)
2462dbl.spamhaus.org (result 127.0.1.2 = spam source)
1878hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1771hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1491multi.surbl.org
1425hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1335multi.uribl.com (union of all results)
1324multi.uribl.com (result 127.0.0.2 = spam resource)
766dob.sibl.support-intelligence.net
764urired.spameatingmonkey.net
719fresh.spameatingmonkey.net
589l1.apews.org
281hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
39hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
30hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
18rhsbl.ahbl.org
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 December 2012.