Blacklists Compared

10 May 2014

[ 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
35093(total number of IP addresses tested, including 142 at SDSC)
30582(union of most IP zones)
24016l2.apews.org
23611b.barracudacentral.org
21862zen.spamhaus.org (union of all results)
19445cbl.abuseat.org
19437zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
17700spam.dnsbl.sorbs.net
15459dnsbl-1.uceprotect.net
14624hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14473ubl.unsubscore.com
14435bl.tiopan.com
12567hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
12480psbl.surriel.com
12477bl.mailspike.net (union of all results)
12208zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
10785bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9432dnsbl.inps.de
8161dnsbl.sorbs.net (union of all results)
8100all.spamrats.com (union of all results)
6610bl.spameatingmonkey.net
6555db.wpbl.info
6554dnsbl-2.uceprotect.net
6328list.dnswl.org (not a blacklist!)
5546wl.mailspike.net (union of all results) (not a blacklist!)
5253all.spamrats.com (result 127.0.0.36 = dialup)
4543dnsbl-3.uceprotect.net
3982dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3754dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3271hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3007wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2966bl.spamcop.net
2882truncate.gbudb.net
2791hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2706ips.backscatterer.org
2685zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2510all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2504hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2142hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1757zen.spamhaus.org (union of SBL and SBLCSS results)
1538bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1509wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1467dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1361ix.dnsbl.manitu.net
1292bl.spamcannibal.org
1154zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
987wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
783accredit.habeas.com (not a blacklist!)
762all.s5h.net
724query.bondedsender.org (not a blacklist!)
718spamsources.fabel.dk
690bl.mailspike.net (result 127.0.0.11 = very bad reputation)
678korea.services.net
603zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
549bl.score.senderscore.com
474bl.mailspike.net (result 127.0.0.12 = bad reputation)
458tr.countries.nerd.dk
450free.v4bl.org
365all.spamrats.com (result 127.0.0.38 = spam source)
223mail-abuse.blacklist.jippg.org
154iadb.isipp.com (not a blacklist!)
108bl.mav.com.br
104hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
99dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
99dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
99dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
74iadb2.isipp.com (not a blacklist!)
57tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
57tor.dnsbl.sectoor.de (union of all results)
43wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
34spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
34spamguard.leadmon.net (union of all results)
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
6dnsbl-0.uceprotect.net
5multi.surbl.org
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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
35093(total number of IP addresses whose names were tested, including 142 at SDSC)
21516hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17234hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7614l1.apews.org
2389hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2267(union of most domain zones)
2236hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
996hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
808dbl.spamhaus.org (result 127.0.1.2 = spam source)
808dbl.spamhaus.org (union of all results)
708hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
441hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
130hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
113dob.sibl.support-intelligence.net
74hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
61multi.surbl.org
56multi.uribl.com (union of all results)
55multi.uribl.com (result 127.0.0.2 = spam resource)
50fresh.spameatingmonkey.net
16urired.spameatingmonkey.net
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
28733(total number of domains tested, including 86 at SDSC)
19940hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4875(union of most domain zones)
3971hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3268dbl.spamhaus.org (result 127.0.1.2 = spam source)
3268dbl.spamhaus.org (union of all results)
2883hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2737hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1982multi.uribl.com (union of all results)
1969multi.uribl.com (result 127.0.0.2 = spam resource)
1648multi.surbl.org
1619hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1532hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
812dob.sibl.support-intelligence.net
697l1.apews.org
323fresh.spameatingmonkey.net
241hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
108urired.spameatingmonkey.net
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 May 2014.