Blacklists Compared

25 December 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, 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
85442(total number of IP addresses tested, including 150 at SDSC)
82351(union of most IP zones)
75020b.barracudacentral.org
74176zen.spamhaus.org (union of all results)
72159zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
72158cbl.abuseat.org
71681l2.apews.org
59742hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
55724dnsbl-1.uceprotect.net
51635bl.mailspike.net (union of all results)
46493psbl.surriel.com
45576zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
45555bl.spameatingmonkey.net
44323dnsbl-2.uceprotect.net
43805dnsbl-3.uceprotect.net
40591bl.tiopan.com
35314hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
31810bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
29993ubl.unsubscore.com
29833spam.dnsbl.sorbs.net
29768blackholes.five-ten-sg.com (union of all results)
24783bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
22066db.wpbl.info
21686bl.score.senderscore.com
17992dnsbl.sorbs.net (union of all results)
17261bl.mailspike.net (result 127.0.0.11 = very bad reputation)
17259blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
14060dnsbl.sorbs.net (result 127.0.0.10 = dialup)
11470zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
11392dnsbl.inps.de
11198blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10583bl.spamcop.net
8829no-more-funn.moensted.dk (union of all results)
7187hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6216no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4755list.dnswl.org (not a blacklist!)
4744mail-abuse.blacklist.jippg.org
4477ix.dnsbl.manitu.net
4318bl.mailspike.net (result 127.0.0.12 = bad reputation)
3683ips.backscatterer.org
3046hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2803wl.mailspike.net (union of all results) (not a blacklist!)
2697wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2382no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2202dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2072bl.spamcannibal.org
1861dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1831hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1643spamsources.fabel.dk
1522korea.services.net
1291blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
873hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
805dnsbl.njabl.org (union of all results)
617dnsbl.njabl.org (result 127.0.0.9 = open proxy)
608tr.countries.nerd.dk
603accredit.habeas.com (not a blacklist!)
542l2.bbfh.ext.sorbs.net
509query.bondedsender.org (not a blacklist!)
421aspews.ext.sorbs.net
345zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
345zen.spamhaus.org (union of SBL and SBLCSS results)
335dnsbl.ahbl.org (union of all results)
255dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
247l1.bbfh.ext.sorbs.net
145dnsbl.njabl.org (result 127.0.0.2 = open relay)
139no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
136iadb2.isipp.com (not a blacklist!)
130dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
130dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
130dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
118iadb.isipp.com (not a blacklist!)
97hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
88wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
60tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
60tor.dnsbl.sectoor.de (union of all results)
59no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
57no-more-funn.moensted.dk (result 127.0.0.9 = misc)
51dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
43dnsbl.njabl.org (result 127.0.0.4 = spam source)
29dnsbl.ahbl.org (result 127.0.0.4 = spam source)
22zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
19blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
17multi.surbl.org
17bl.deadbeef.com
17swl.spamhaus.org (union of all results) (not a blacklist!)
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
85442(total number of IP addresses whose names were tested, including 150 at SDSC)
50880hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
42860hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37270(union of most domain zones)
32247abuse.rfc-ignorant.org
30853l1.apews.org
11113whois.rfc-ignorant.org (union of all results)
7758whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5179hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3577hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3355whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1549hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
721hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
327urired.spameatingmonkey.net
310hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
258dbl.spamhaus.org
192hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
80multi.surbl.org
66hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
38postmaster.rfc-ignorant.org
28bogusmx.rfc-ignorant.org
21dsn.rfc-ignorant.org (zone not intended for this use)
20multi.uribl.com (result 127.0.0.2 = spam resource)
20rhsbl.ahbl.org
20multi.uribl.com (union of all results)
17fresh.spameatingmonkey.net
17dob.sibl.support-intelligence.net
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4bl.deadbeef.com
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
26248(total number of domains tested, including 123 at SDSC)
23302hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7528(union of most domain zones)
4790hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3036whois.rfc-ignorant.org (union of all results)
2837whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2657hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2495abuse.rfc-ignorant.org
2455hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1295postmaster.rfc-ignorant.org
1207hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1045l1.apews.org
1016urired.spameatingmonkey.net
955hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
928dbl.spamhaus.org
681multi.surbl.org
487multi.uribl.com (union of all results)
475multi.uribl.com (result 127.0.0.2 = spam resource)
420hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
413bogusmx.rfc-ignorant.org
259dsn.rfc-ignorant.org
199whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78fresh.spameatingmonkey.net
57dob.sibl.support-intelligence.net
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13rhsbl.ahbl.org
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 December 2010.