Blacklists Compared

12 February 2011

[ 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
80811(total number of IP addresses tested, including 166 at SDSC)
77386(union of most IP zones)
69067b.barracudacentral.org
67331zen.spamhaus.org (union of all results)
66083cbl.abuseat.org
66079zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
65859l2.apews.org
55824hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53666bl.mailspike.net (union of all results)
51155dnsbl-1.uceprotect.net
42502bl.tiopan.com
42231bl.spameatingmonkey.net
41830zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
41258psbl.surriel.com
39845dnsbl-3.uceprotect.net
39072dnsbl-2.uceprotect.net
36651hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36270bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
29638spam.dnsbl.sorbs.net
25979ubl.unsubscore.com
24004blackholes.five-ten-sg.com (union of all results)
19579db.wpbl.info
19297bl.mailspike.net (result 127.0.0.11 = very bad reputation)
18932dnsbl.sorbs.net (union of all results)
15805bl.spamcop.net
14388bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
13391dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12488blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
10082blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9912ix.dnsbl.manitu.net
9539dnsbl.inps.de
9492bl.mailspike.net (result 127.0.0.12 = bad reputation)
9285zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
8374no-more-funn.moensted.dk (union of all results)
8222mail-abuse.blacklist.jippg.org
6122no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5546hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5213list.dnswl.org (not a blacklist!)
3758wl.mailspike.net (union of all results) (not a blacklist!)
3682dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3305hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3134ips.backscatterer.org
2480wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2266hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2263dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2086no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1703bl.spamcannibal.org
1611hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1399blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1300spamsources.fabel.dk
1298korea.services.net
1272wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1047bl.score.senderscore.com
674dnsbl.njabl.org (union of all results)
655tr.countries.nerd.dk
631accredit.habeas.com (not a blacklist!)
576l2.bbfh.ext.sorbs.net
570query.bondedsender.org (not a blacklist!)
562dnsbl.njabl.org (result 127.0.0.9 = open proxy)
388aspews.ext.sorbs.net
355dnsbl.ahbl.org (union of all results)
260zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
260zen.spamhaus.org (union of SBL and SBLCSS results)
224dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
219l1.bbfh.ext.sorbs.net
137iadb2.isipp.com (not a blacklist!)
110iadb.isipp.com (not a blacklist!)
107dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
107dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
107dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
88no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
84no-more-funn.moensted.dk (result 127.0.0.9 = misc)
82hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
77dnsbl.njabl.org (result 127.0.0.2 = open relay)
66dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
64dnsbl.ahbl.org (result 127.0.0.4 = spam source)
61no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
43tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
43tor.dnsbl.sectoor.de (union of all results)
35dnsbl.njabl.org (result 127.0.0.4 = spam source)
35blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20swl.spamhaus.org (union of all results) (not a blacklist!)
16bl.deadbeef.com
12swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7spamguard.leadmon.net (union of all results)
6multi.surbl.org
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5dnsbl-0.uceprotect.net
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
80811(total number of IP addresses whose names were tested, including 166 at SDSC)
51390hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
43970hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36930(union of most domain zones)
31054abuse.rfc-ignorant.org
30644l1.apews.org
11766whois.rfc-ignorant.org (union of all results)
8674whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5097hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3786hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3092whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1046hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1031hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
388dbl.spamhaus.org
278hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
275urired.spameatingmonkey.net
154hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
76hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50postmaster.rfc-ignorant.org
32bogusmx.rfc-ignorant.org
31dsn.rfc-ignorant.org (zone not intended for this use)
24dob.sibl.support-intelligence.net
20fresh.spameatingmonkey.net
18rhsbl.ahbl.org
16multi.surbl.org
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
1bl.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
25467(total number of domains tested, including 129 at SDSC)
23371hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7735(union of most domain zones)
5530hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3579whois.rfc-ignorant.org (union of all results)
3396whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3086hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2589hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2487abuse.rfc-ignorant.org
1451postmaster.rfc-ignorant.org
992l1.apews.org
667urired.spameatingmonkey.net
663hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
558dbl.spamhaus.org
550bogusmx.rfc-ignorant.org
547hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
470multi.surbl.org
401hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
387multi.uribl.com (union of all results)
379multi.uribl.com (result 127.0.0.2 = spam resource)
297dsn.rfc-ignorant.org
183whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
80dob.sibl.support-intelligence.net
65fresh.spameatingmonkey.net
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15rhsbl.ahbl.org
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 February 2011.