Blacklists Compared

28 June 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
54507(total number of IP addresses tested, including 147 at SDSC)
50116(union of most IP zones)
42853b.barracudacentral.org
41104zen.spamhaus.org (union of all results)
38302cbl.abuseat.org
38291zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
36251ubl.unsubscore.com
33709spam.dnsbl.sorbs.net
32168all.s5h.net
30573dnsbl-1.uceprotect.net
29715hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28703bl.tiopan.com
26458psbl.surriel.com
23258zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
23123bl.mailspike.net (union of all results)
22912hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19182dnsbl.inps.de
18596bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
17674l2.apews.org
17009db.wpbl.info
15560bl.spameatingmonkey.net
15354dnsbl.sorbs.net (union of all results)
15026dnsbl-2.uceprotect.net
14928all.spamrats.com (union of all results)
12660dnsbl-3.uceprotect.net
9994all.spamrats.com (result 127.0.0.36 = dialup)
7731dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6493dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6207list.dnswl.org (not a blacklist!)
5695truncate.gbudb.net
5459wl.mailspike.net (union of all results) (not a blacklist!)
5046ips.backscatterer.org
4874zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4482all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4147bl.spamcop.net
3627dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3180hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3136hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2866wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2695hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2503bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2493hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2138bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2036ix.dnsbl.manitu.net
1892zen.spamhaus.org (union of SBL and SBLCSS results)
1605bl.spamcannibal.org
1429wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1025zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1022wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
930bl.mailspike.net (result 127.0.0.12 = bad reputation)
898free.v4bl.org
881bl.score.senderscore.com
867zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
860spamsources.fabel.dk
812korea.services.net
747accredit.habeas.com (not a blacklist!)
672query.bondedsender.org (not a blacklist!)
528all.spamrats.com (result 127.0.0.38 = spam source)
478tr.countries.nerd.dk
233hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
233mail-abuse.blacklist.jippg.org
142wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
125iadb.isipp.com (not a blacklist!)
90bl.mav.com.br
89dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
89dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
89dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
65iadb2.isipp.com (not a blacklist!)
37tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
37tor.dnsbl.sectoor.de (union of all results)
20multi.uribl.com (result 127.0.0.2 = spam resource)
20multi.uribl.com (union of all results)
7spamguard.leadmon.net (union of all results)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
6spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2dnsbl-0.uceprotect.net
2multi.surbl.org
1wadb.isipp.com
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
54507(total number of IP addresses whose names were tested, including 147 at SDSC)
32432hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25871hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7026l1.apews.org
3610hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2445(union of most domain zones)
2339hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
976hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
908hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
821dbl.spamhaus.org (result 127.0.1.2 = spam source)
821dbl.spamhaus.org (union of all results)
398hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
235hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
188hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
176multi.surbl.org
156multi.uribl.com (union of all results)
155multi.uribl.com (result 127.0.0.2 = spam resource)
65hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
49fresh.spameatingmonkey.net
20urired.spameatingmonkey.net
18dob.sibl.support-intelligence.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
40798(total number of domains tested, including 95 at SDSC)
27256hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5590(union of most domain zones)
4405hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4308hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
4273dbl.spamhaus.org (union of all results)
4272dbl.spamhaus.org (result 127.0.1.2 = spam source)
3051hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2456multi.surbl.org
2267multi.uribl.com (union of all results)
2250multi.uribl.com (result 127.0.0.2 = spam resource)
1498dob.sibl.support-intelligence.net
1491fresh.spameatingmonkey.net
1373hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1318hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
884l1.apews.org
201hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
154urired.spameatingmonkey.net
48hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
39hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3ex.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 1 July 2014.