Blacklists Compared

12 November 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
57670(total number of IP addresses tested, including 159 at SDSC)
54549(union of most IP zones)
45424l2.apews.org
44693zen.spamhaus.org (union of all results)
42787cbl.abuseat.org
42785zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
42693b.barracudacentral.org
36996hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
35850ip.v4bl.org
31970bl.mailspike.net (union of all results)
29411dnsbl.sorbs.net (union of all results)
29154zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
28067dnsbl-3.uceprotect.net
28065dnsbl-1.uceprotect.net
27879dnsbl-2.uceprotect.net
27372spam.dnsbl.sorbs.net
23959bl.tiopan.com
21702truncate.gbudb.net
20421dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
20293bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
19847bl.spameatingmonkey.net
19697hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17517ubl.unsubscore.com
16755blackholes.five-ten-sg.com (union of all results)
15539bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15133psbl.surriel.com
12607bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10575dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7873blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7247blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6768db.wpbl.info
6101bl.spamcop.net
5949dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5942zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5702hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5673list.dnswl.org (not a blacklist!)
4951bl.score.senderscore.com
4741no-more-funn.moensted.dk (union of all results)
4106wl.mailspike.net (union of all results) (not a blacklist!)
4091dnsbl.inps.de
3834ix.dnsbl.manitu.net
2657wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2655ips.backscatterer.org
2561hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2403no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2378hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1990no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1765hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1734korea.services.net
1614blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1441wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1286bl.spamcannibal.org
1163spamsources.fabel.dk
858mail-abuse.blacklist.jippg.org
637accredit.habeas.com (not a blacklist!)
605query.bondedsender.org (not a blacklist!)
506zen.spamhaus.org (union of SBL and SBLCSS results)
404zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
392dnsbl.njabl.org (union of all results)
330dnsbl.njabl.org (result 127.0.0.9 = open proxy)
318dnsbl.ahbl.org (union of all results)
272aspews.ext.sorbs.net
228dnsbl.ahbl.org (result 127.0.0.4 = spam source)
204iadb.isipp.com (not a blacklist!)
199tr.countries.nerd.dk
186no-more-funn.moensted.dk (result 127.0.0.9 = misc)
145hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
140no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
119l2.bbfh.ext.sorbs.net
112iadb2.isipp.com (not a blacklist!)
102zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
77dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
77dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
77dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
59dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
49no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
42l1.bbfh.ext.sorbs.net
37hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
36dnsbl.njabl.org (result 127.0.0.2 = open relay)
31dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
28spamguard.leadmon.net (union of all results)
26dnsbl.njabl.org (result 127.0.0.4 = spam source)
26spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
25swl.spamhaus.org (union of all results) (not a blacklist!)
25tor.dnsbl.sectoor.de (union of all results)
24tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9dnsbl-0.uceprotect.net
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9bl.deadbeef.com
8swl.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!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
7multi.surbl.org
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = 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
57670(total number of IP addresses whose names were tested, including 159 at SDSC)
30173hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23712hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20838(union of most domain zones)
16488abuse.rfc-ignorant.org
13626l1.apews.org
8912whois.rfc-ignorant.org (union of all results)
7763whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4155hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2825hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1150whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
387hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
320dbl.spamhaus.org (result 127.0.1.2 = spam source)
320dbl.spamhaus.org (union of all results)
260hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
244urired.spameatingmonkey.net
197hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
184hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
183hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
75rhsbl.ahbl.org
60postmaster.rfc-ignorant.org
42fresh.spameatingmonkey.net
35multi.surbl.org
31bogusmx.rfc-ignorant.org
27multi.uribl.com (result 127.0.0.2 = spam resource)
27multi.uribl.com (union of all results)
13dob.sibl.support-intelligence.net
10dsn.rfc-ignorant.org (zone not intended for this use)
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
25195(total number of domains tested, including 128 at SDSC)
20368hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5436(union of most domain zones)
3870hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2240whois.rfc-ignorant.org (union of all results)
2224hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2140hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2105whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1351abuse.rfc-ignorant.org
822dbl.spamhaus.org (result 127.0.1.2 = spam source)
822dbl.spamhaus.org (union of all results)
801hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
760postmaster.rfc-ignorant.org
662hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
597l1.apews.org
592multi.surbl.org
534multi.uribl.com (union of all results)
525urired.spameatingmonkey.net
521multi.uribl.com (result 127.0.0.2 = spam resource)
470bogusmx.rfc-ignorant.org
315hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
251dsn.rfc-ignorant.org
135whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
116fresh.spameatingmonkey.net
34dob.sibl.support-intelligence.net
28rhsbl.ahbl.org
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11ex.dnsbl.org
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 14 November 2011.