Blacklists Compared

22 October 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
59864(total number of IP addresses tested, including 176 at SDSC)
56994(union of most IP zones)
47048l2.apews.org
45941zen.spamhaus.org (union of all results)
45000b.barracudacentral.org
44252zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
44252cbl.abuseat.org
39263hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
38864ip.v4bl.org
31404dnsbl-1.uceprotect.net
31242bl.mailspike.net (union of all results)
30218zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
29987dnsbl-2.uceprotect.net
29692dnsbl-3.uceprotect.net
29158spam.dnsbl.sorbs.net
29027dnsbl.sorbs.net (union of all results)
25175bl.tiopan.com
24782truncate.gbudb.net
21066bl.spameatingmonkey.net
21045hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20731ubl.unsubscore.com
20636dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17876blackholes.five-ten-sg.com (union of all results)
17872psbl.surriel.com
15114bl.mailspike.net (result 127.0.0.11 = very bad reputation)
13483bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10509dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8245blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8042blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7074db.wpbl.info
6715bl.spamcop.net
6268hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6007zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5878list.dnswl.org (not a blacklist!)
5197no-more-funn.moensted.dk (union of all results)
4706bl.score.senderscore.com
4551dnsbl.inps.de
4168dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4075wl.mailspike.net (union of all results) (not a blacklist!)
3071ips.backscatterer.org
2797no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2639bl.mailspike.net (result 127.0.0.12 = bad reputation)
2591hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2571wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2421hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2163no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1762hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1756korea.services.net
1567blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1499wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1432ix.dnsbl.manitu.net
1285spamsources.fabel.dk
1274bl.spamcannibal.org
1015mail-abuse.blacklist.jippg.org
621accredit.habeas.com (not a blacklist!)
551query.bondedsender.org (not a blacklist!)
477zen.spamhaus.org (union of SBL and SBLCSS results)
430dnsbl.njabl.org (union of all results)
401zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
387aspews.ext.sorbs.net
329dnsbl.njabl.org (result 127.0.0.9 = open proxy)
319tr.countries.nerd.dk
309dnsbl.ahbl.org (union of all results)
218dnsbl.ahbl.org (result 127.0.0.4 = spam source)
175iadb.isipp.com (not a blacklist!)
144hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
116no-more-funn.moensted.dk (result 127.0.0.9 = misc)
115l2.bbfh.ext.sorbs.net
113iadb2.isipp.com (not a blacklist!)
110no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
81dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
81dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
81dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
76zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
72bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
69dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
67dnsbl.njabl.org (result 127.0.0.4 = spam source)
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
41tor.dnsbl.sectoor.de (union of all results)
35hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34dnsbl.njabl.org (result 127.0.0.2 = open relay)
29no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
26swl.spamhaus.org (union of all results) (not a blacklist!)
22dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
19bl.deadbeef.com
12l1.bbfh.ext.sorbs.net
10dnsbl-0.uceprotect.net
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
8multi.surbl.org
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (union of all results)
2spamguard.leadmon.net (union of all results)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
59864(total number of IP addresses whose names were tested, including 176 at SDSC)
31254hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24733hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21306(union of most domain zones)
17087abuse.rfc-ignorant.org
13952l1.apews.org
8884whois.rfc-ignorant.org (union of all results)
7677whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4242hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2895hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1208whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
399hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
327hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
262dbl.spamhaus.org (result 127.0.1.2 = spam source)
262dbl.spamhaus.org (union of all results)
233hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
228hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
225hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
191urired.spameatingmonkey.net
50postmaster.rfc-ignorant.org
39rhsbl.ahbl.org
38bogusmx.rfc-ignorant.org
34multi.surbl.org
26multi.uribl.com (result 127.0.0.2 = spam resource)
26multi.uribl.com (union of all results)
15fresh.spameatingmonkey.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8dob.sibl.support-intelligence.net
3dsn.rfc-ignorant.org (zone not intended for this use)
2bl.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
31733(total number of domains tested, including 148 at SDSC)
28774hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6324(union of most domain zones)
4005hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2575whois.rfc-ignorant.org (union of all results)
2453whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2232hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2149hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1505abuse.rfc-ignorant.org
1392hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
846urired.spameatingmonkey.net
815dbl.spamhaus.org (union of all results)
814dbl.spamhaus.org (result 127.0.1.2 = spam source)
783postmaster.rfc-ignorant.org
701hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
630bogusmx.rfc-ignorant.org
602l1.apews.org
500multi.surbl.org
480multi.uribl.com (union of all results)
469multi.uribl.com (result 127.0.0.2 = spam resource)
364hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
280dsn.rfc-ignorant.org
125fresh.spameatingmonkey.net
122whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
98hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
45dob.sibl.support-intelligence.net
31rhsbl.ahbl.org
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 October 2011.