Blacklists Compared

23 November 2013

[ 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
31411(total number of IP addresses tested, including 147 at SDSC)
26287(union of most IP zones)
20082l2.apews.org
19139b.barracudacentral.org
17668zen.spamhaus.org (union of all results)
15830cbl.abuseat.org
15829zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15556hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14449hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14107spam.dnsbl.sorbs.net
10856zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
10241bl.tiopan.com
9845dnsbl-1.uceprotect.net
8815ubl.unsubscore.com
8695dnsbl.sorbs.net (union of all results)
8614bl.mailspike.net (union of all results)
7874all.spamrats.com (union of all results)
7472db.wpbl.info
6686dnsbl.inps.de
6475psbl.surriel.com
6376list.dnswl.org (not a blacklist!)
5729dnsbl-2.uceprotect.net
5632wl.mailspike.net (union of all results) (not a blacklist!)
5396bl.spamcop.net
5147ips.backscatterer.org
5046all.spamrats.com (result 127.0.0.36 = dialup)
4900truncate.gbudb.net
4761dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4235bl.spameatingmonkey.net
3496hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3430bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3397dnsbl-3.uceprotect.net
3297wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3232dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2930bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2768hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2668dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2581all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2241hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2215bl.score.senderscore.com
2125ix.dnsbl.manitu.net
1801hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1784bl.mailspike.net (result 127.0.0.12 = bad reputation)
1551wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1436zen.spamhaus.org (union of SBL and SBLCSS results)
1254bl.spamcannibal.org
1177zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1001bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
898mail-abuse.blacklist.jippg.org
822accredit.habeas.com (not a blacklist!)
811zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
792spamsources.fabel.dk
776query.bondedsender.org (not a blacklist!)
662wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
625zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
474all.s5h.net
385korea.services.net
266all.spamrats.com (result 127.0.0.38 = spam source)
265tr.countries.nerd.dk
166iadb.isipp.com (not a blacklist!)
153bl.mav.com.br
146hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
122wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
116free.v4bl.org
89iadb2.isipp.com (not a blacklist!)
79dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
79dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
79dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
65tor.dnsbl.sectoor.de (union of all results)
64tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
59dnsbl.ahbl.org (union of all results)
53dnsbl.ahbl.org (result 127.0.0.4 = spam source)
7dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
4multi.surbl.org
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3spamguard.leadmon.net (union of all results)
2dnsbl-0.uceprotect.net
1wadb.isipp.com
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
31411(total number of IP addresses whose names were tested, including 147 at SDSC)
19036hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15279hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4909l1.apews.org
2504hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2067hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1839(union of most domain zones)
893dbl.spamhaus.org (result 127.0.1.2 = spam source)
893dbl.spamhaus.org (union of all results)
811hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
345hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
326hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
131hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
105fresh.spameatingmonkey.net
84multi.surbl.org
70hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
51dob.sibl.support-intelligence.net
49rhsbl.ahbl.org
43hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
34urired.spameatingmonkey.net
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
17458(total number of domains tested, including 102 at SDSC)
13645hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3815hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3714(union of most domain zones)
2800dbl.spamhaus.org (result 127.0.1.2 = spam source)
2800dbl.spamhaus.org (union of all results)
2360hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2261hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1431hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1236hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1081multi.surbl.org
780fresh.spameatingmonkey.net
492dob.sibl.support-intelligence.net
410l1.apews.org
204hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
44urired.spameatingmonkey.net
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
36hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
35rhsbl.ahbl.org
9hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 November 2013.