Blacklists Compared

6 October 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
28209(total number of IP addresses tested, including 169 at SDSC)
23307(union of most IP zones)
18193ip.v4bl.org
16807b.barracudacentral.org
16737hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16329l2.apews.org
15926zen.spamhaus.org (union of all results)
14815zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
14815cbl.abuseat.org
13125hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
10715wl.mailspike.net (union of all results) (not a blacklist!)
10253dnsbl-1.uceprotect.net
9231zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
8241psbl.surriel.com
7097dnsbl-2.uceprotect.net
7061ubl.unsubscore.com
6744all.spamrats.com (union of all results)
6362spam.dnsbl.sorbs.net
6347list.dnswl.org (not a blacklist!)
6237bl.mailspike.net (union of all results)
6012wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5452bl.mailspike.net (result 127.0.0.12 = bad reputation)
5433dnsbl.inps.de
4508bl.spameatingmonkey.net
4321dnsbl.sorbs.net (union of all results)
4200dnsbl-3.uceprotect.net
4008wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3395all.spamrats.com (result 127.0.0.36 = dialup)
3072all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3070db.wpbl.info
3021hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2931hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2799dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2354bl.spamcop.net
2206truncate.gbudb.net
2133zen.spamhaus.org (union of SBL and SBLCSS results)
1910ips.backscatterer.org
1668dnsbl.sorbs.net (result 127.0.0.10 = dialup)
1646bl.score.senderscore.com
1515hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1278ix.dnsbl.manitu.net
1226spamsources.fabel.dk
1183zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1121zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1012zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
821bl.spamcannibal.org
804accredit.habeas.com (not a blacklist!)
797bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
652query.bondedsender.org (not a blacklist!)
612hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
553wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
526tr.countries.nerd.dk
466mail-abuse.blacklist.jippg.org
460bl.mailspike.net (result 127.0.0.11 = very bad reputation)
430korea.services.net
285all.spamrats.com (result 127.0.0.38 = spam source)
271l2.bbfh.ext.sorbs.net
261aspews.ext.sorbs.net
223iadb.isipp.com (not a blacklist!)
148dnsbl.njabl.org (union of all results)
142wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
107hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
101dnsbl.ahbl.org (union of all results)
100dnsbl.njabl.org (result 127.0.0.9 = open proxy)
82bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
70all.s5h.net
56dnsbl.ahbl.org (result 127.0.0.4 = spam source)
50tor.dnsbl.sectoor.de (union of all results)
47tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
30dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
30dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
30dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
28dnsbl.njabl.org (result 127.0.0.4 = spam source)
27dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
20dnsbl.njabl.org (result 127.0.0.2 = open relay)
18dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7iadb2.isipp.com (not a blacklist!)
5spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
5spamguard.leadmon.net (union of all results)
3dnsbl-0.uceprotect.net
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3multi.surbl.org
1multi.uribl.com (result 127.0.0.2 = spam resource)
1multi.uribl.com (union of all results)
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
28209(total number of IP addresses whose names were tested, including 169 at SDSC)
15745hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12696hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3660l1.apews.org
2789hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1939hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1186(union of most domain zones)
490dbl.spamhaus.org (result 127.0.1.2 = spam source)
490dbl.spamhaus.org (union of all results)
473hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
254hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
149hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
144hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
73hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
34urired.spameatingmonkey.net
27rhsbl.ahbl.org
25fresh.spameatingmonkey.net
23multi.surbl.org
22multi.uribl.com (result 127.0.0.2 = spam resource)
22multi.uribl.com (union of all results)
16dob.sibl.support-intelligence.net
12hostkarma.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
22178(total number of domains tested, including 131 at SDSC)
18539hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4192(union of most domain zones)
3786hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3494hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3263dbl.spamhaus.org (union of all results)
3261dbl.spamhaus.org (result 127.0.1.2 = spam source)
2454multi.surbl.org
1898hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1779hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1526multi.uribl.com (union of all results)
1508multi.uribl.com (result 127.0.0.2 = spam resource)
1245hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
688dob.sibl.support-intelligence.net
571fresh.spameatingmonkey.net
468l1.apews.org
257hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
87urired.spameatingmonkey.net
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 October 2012.