Blacklists Compared

25 September 2010

[ 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, and wl.mailspike.net zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
171015(total number of IP addresses tested, including 189 at SDSC)
167981(union of most IP zones)
157556b.barracudacentral.org
155689zen.spamhaus.org (union of all results)
133075cbl.abuseat.org
133028zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
119390dnsbl-1.uceprotect.net
111743dnsbl-2.uceprotect.net
109760bl.spameatingmonkey.net
109230dnsbl-3.uceprotect.net
106378psbl.surriel.com
102734hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
101015zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
100668bl.mailspike.net (union of all results)
96528bl.tiopan.com
86452dnsbl.sorbs.net (union of all results)
64759l2.apews.org
61208dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
59123spam.dnsbl.sorbs.net
58672hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
51552blackholes.five-ten-sg.com (union of all results)
51167bl.score.senderscore.com
50320bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
45193bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
36650bl.spamcop.net
36400blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
35724dnsbl.sorbs.net (result 127.0.0.10 = dialup)
31980db.wpbl.info
26971ubl.unsubscore.com
26754zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
24211bl.mailspike.net (result 127.0.0.11 = very bad reputation)
21697ix.dnsbl.manitu.net
18812mail-abuse.blacklist.jippg.org
18703no-more-funn.moensted.dk (union of all results)
17660dnsbl.inps.de
16452bl.mailspike.net (result 127.0.0.12 = bad reputation)
14145no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
13849blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10549hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5839dnsbl.ahbl.org (union of all results)
5444ips.backscatterer.org
5133dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4712wl.mailspike.net (union of all results) (not a blacklist!)
4332list.dnswl.org (not a blacklist!)
4142bl.spamcannibal.org
3790no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3175spamsources.fabel.dk
2924hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2736hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2629korea.services.net
2492wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2161hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1627wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1469dnsbl.njabl.org (union of all results)
1307dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1282blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1233tr.countries.nerd.dk
926l2.bbfh.ext.sorbs.net
620dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
593wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
541l1.bbfh.ext.sorbs.net
512accredit.habeas.com (not a blacklist!)
499aspews.ext.sorbs.net
497no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
456query.bondedsender.org (not a blacklist!)
281no-more-funn.moensted.dk (result 127.0.0.9 = misc)
247zen.spamhaus.org (union of SBL and SBLCSS results)
244zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
138iadb2.isipp.com (not a blacklist!)
126tor.dnsbl.sectoor.de (union of all results)
124tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
106iadb.isipp.com (not a blacklist!)
101no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
86dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
83dnsbl.njabl.org (result 127.0.0.2 = open relay)
79dnsbl.njabl.org (result 127.0.0.4 = spam source)
65hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
39bl.deadbeef.com
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17spamguard.leadmon.net (union of all results)
14spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
12zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8dnsbl-0.uceprotect.net
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
3multi.surbl.org
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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
171015(total number of IP addresses whose names were tested, including 189 at SDSC)
89898hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
80663(union of most domain zones)
77511hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
67186abuse.rfc-ignorant.org
29948whois.rfc-ignorant.org (union of all results)
27956l1.apews.org
22549whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9100hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7399whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3552hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2505hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
608hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
561urired.spameatingmonkey.net
427dbl.spamhaus.org
329hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
284dob.sibl.support-intelligence.net
227hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
80rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
80rhsbl.sorbs.net (union of all results)
53postmaster.rfc-ignorant.org
51hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50rhsbl.ahbl.org
39dsn.rfc-ignorant.org (zone not intended for this use)
37bogusmx.rfc-ignorant.org
33multi.surbl.org
33fresh.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20multi.uribl.com (result 127.0.0.2 = spam resource)
20multi.uribl.com (union of all results)
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
46340(total number of domains tested, including 174 at SDSC)
36371hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16782(union of most domain zones)
11915hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
9113abuse.rfc-ignorant.org
6275l1.apews.org
5472whois.rfc-ignorant.org (union of all results)
4868whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3394hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2624hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1776hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1734urired.spameatingmonkey.net
1482postmaster.rfc-ignorant.org
1299dbl.spamhaus.org
1231hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1093multi.surbl.org
740dob.sibl.support-intelligence.net
604whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
485bogusmx.rfc-ignorant.org
442multi.uribl.com (union of all results)
433multi.uribl.com (result 127.0.0.2 = spam resource)
376hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
278dsn.rfc-ignorant.org
29rhsbl.ahbl.org
27hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
26fresh.spameatingmonkey.net
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
15rhsbl.sorbs.net (union of all results)
12ex.dnsbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 September 2010.