Blacklists Compared

20 October 2012

[ 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
39281(total number of IP addresses tested, including 171 at SDSC)
35384(union of most IP zones)
27025l2.apews.org
26856ip.v4bl.org
26477zen.spamhaus.org (union of all results)
25844b.barracudacentral.org
25403cbl.abuseat.org
25402zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
24639bl.tiopan.com
20891hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20438hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
18024dnsbl-1.uceprotect.net
16232bl.mailspike.net (union of all results)
16128zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
13294bl.mailspike.net (result 127.0.0.12 = bad reputation)
12925dnsbl-2.uceprotect.net
12561psbl.surriel.com
11956ubl.unsubscore.com
11866all.spamrats.com (union of all results)
11549dnsbl-3.uceprotect.net
9841wl.mailspike.net (union of all results) (not a blacklist!)
9780dnsbl.sorbs.net (union of all results)
9285dnsbl.inps.de
8623spam.dnsbl.sorbs.net
7886free.v4bl.org
7520bl.spameatingmonkey.net
6607dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6371list.dnswl.org (not a blacklist!)
6312wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5823all.spamrats.com (result 127.0.0.36 = dialup)
5692all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5211db.wpbl.info
4360bl.spamcop.net
3932truncate.gbudb.net
3718dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2969hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2946hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2751wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2420zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2282bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2163ips.backscatterer.org
2082ix.dnsbl.manitu.net
2061all.s5h.net
2056bl.score.senderscore.com
1876bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1699zen.spamhaus.org (union of SBL and SBLCSS results)
1655hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1155bl.spamcannibal.org
1152hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1148mail-abuse.blacklist.jippg.org
989spamsources.fabel.dk
862zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
837zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
771accredit.habeas.com (not a blacklist!)
713tr.countries.nerd.dk
658query.bondedsender.org (not a blacklist!)
578korea.services.net
548wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
388all.spamrats.com (result 127.0.0.38 = spam source)
278bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
266l2.bbfh.ext.sorbs.net
266aspews.ext.sorbs.net
234wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
221iadb.isipp.com (not a blacklist!)
210dnsbl.njabl.org (union of all results)
160dnsbl.njabl.org (result 127.0.0.9 = open proxy)
139dnsbl.ahbl.org (union of all results)
111hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
110iadb2.isipp.com (not a blacklist!)
95dnsbl.ahbl.org (result 127.0.0.4 = spam source)
55tor.dnsbl.sectoor.de (union of all results)
51tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
31dnsbl.njabl.org (result 127.0.0.4 = spam source)
26dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
26dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
26dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
24dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
20dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
19dnsbl.njabl.org (result 127.0.0.2 = open relay)
6dnsbl-0.uceprotect.net
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
5spamguard.leadmon.net (union of all results)
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3multi.surbl.org
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.6 = 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
39281(total number of IP addresses whose names were tested, including 171 at SDSC)
19738hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16357hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6386l1.apews.org
2819hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2676hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1327(union of most domain zones)
467hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
383dbl.spamhaus.org (result 127.0.1.2 = spam source)
383dbl.spamhaus.org (union of all results)
336hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
272hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
185hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
92hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36fresh.spameatingmonkey.net
27dob.sibl.support-intelligence.net
25urired.spameatingmonkey.net
25rhsbl.ahbl.org
23multi.surbl.org
20multi.uribl.com (result 127.0.0.2 = spam resource)
20multi.uribl.com (union of all results)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
26208(total number of domains tested, including 138 at SDSC)
23014hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4050hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3833(union of most domain zones)
2942hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2558dbl.spamhaus.org (union of all results)
2556dbl.spamhaus.org (result 127.0.1.2 = spam source)
2109hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1951hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1755multi.surbl.org
1441hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1340multi.uribl.com (union of all results)
1320multi.uribl.com (result 127.0.0.2 = spam resource)
647fresh.spameatingmonkey.net
580dob.sibl.support-intelligence.net
512l1.apews.org
334hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
156urired.spameatingmonkey.net
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
17rhsbl.ahbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 October 2012.