Blacklists Compared

9 February 2013

[ 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
54993(total number of IP addresses tested, including 153 at SDSC)
50857(union of most IP zones)
42196b.barracudacentral.org
41457zen.spamhaus.org (union of all results)
41250l2.apews.org
38140ip.v4bl.org
37046bl.tiopan.com
36529cbl.abuseat.org
36510zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33680hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
33267bl.mailspike.net (union of all results)
28510hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
28264dnsbl-1.uceprotect.net
25970zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25767bl.mailspike.net (result 127.0.0.12 = bad reputation)
23655ubl.unsubscore.com
16922dnsbl.sorbs.net (union of all results)
16544db.wpbl.info
16376spam.dnsbl.sorbs.net
15918all.spamrats.com (union of all results)
14696bl.spameatingmonkey.net
13110psbl.surriel.com
12516dnsbl.inps.de
12477free.v4bl.org
11772dnsbl-3.uceprotect.net
10492all.spamrats.com (result 127.0.0.36 = dialup)
10318dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10284dnsbl-2.uceprotect.net
9729truncate.gbudb.net
7625wl.mailspike.net (union of all results) (not a blacklist!)
6661list.dnswl.org (not a blacklist!)
6212bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6044dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5119all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5086wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5058zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4100bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3459ix.dnsbl.manitu.net
3059bl.spamcop.net
2814ips.backscatterer.org
2725hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2674hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2527hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2494bl.score.senderscore.com
2220wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1898dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1621hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1155bl.spamcannibal.org
922zen.spamhaus.org (union of SBL and SBLCSS results)
761accredit.habeas.com (not a blacklist!)
716spamsources.fabel.dk
609query.bondedsender.org (not a blacklist!)
593tr.countries.nerd.dk
583zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
532korea.services.net
458mail-abuse.blacklist.jippg.org
357all.spamrats.com (result 127.0.0.38 = spam source)
339zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
251dnsbl.njabl.org (union of all results)
234bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
216iadb.isipp.com (not a blacklist!)
214l2.bbfh.ext.sorbs.net
193dnsbl.njabl.org (result 127.0.0.9 = open proxy)
187wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
155dnsbl.ahbl.org (union of all results)
148hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
132wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
113dnsbl.ahbl.org (result 127.0.0.4 = spam source)
98iadb2.isipp.com (not a blacklist!)
40dnsbl.njabl.org (result 127.0.0.2 = open relay)
36dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
36dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
36dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
26dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
22tor.dnsbl.sectoor.de (union of all results)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
18dnsbl.njabl.org (result 127.0.0.4 = spam source)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
15all.s5h.net
8dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5dnsbl-0.uceprotect.net
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2multi.surbl.org
2spamguard.leadmon.net (union of all results)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
54993(total number of IP addresses whose names were tested, including 153 at SDSC)
35263hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
29678hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16714l1.apews.org
4068hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2685hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2252(union of most domain zones)
939hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
729hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
537dbl.spamhaus.org (result 127.0.1.2 = spam source)
537dbl.spamhaus.org (union of all results)
276hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
230hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
149urired.spameatingmonkey.net
87hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
67fresh.spameatingmonkey.net
65dob.sibl.support-intelligence.net
42multi.uribl.com (union of all results)
41multi.uribl.com (result 127.0.0.2 = spam resource)
36multi.surbl.org
23rhsbl.ahbl.org
20hostkarma.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
45672(total number of domains tested, including 114 at SDSC)
42780hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3795hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3471(union of most domain zones)
2678hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2049hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1895dbl.spamhaus.org (union of all results)
1890dbl.spamhaus.org (result 127.0.1.2 = spam source)
1871hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1502multi.surbl.org
1166hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1160multi.uribl.com (union of all results)
1147multi.uribl.com (result 127.0.0.2 = spam resource)
901urired.spameatingmonkey.net
585l1.apews.org
506dob.sibl.support-intelligence.net
404fresh.spameatingmonkey.net
264hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
24hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 February 2013.