Blacklists Compared

30 April 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
56181(total number of IP addresses tested, including 174 at SDSC)
52865(union of most IP zones)
43683b.barracudacentral.org
43348l2.apews.org
42835zen.spamhaus.org (union of all results)
40862cbl.abuseat.org
40859zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
34829hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
33411bl.mailspike.net (union of all results)
30708dnsbl-1.uceprotect.net
28599zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
27918dnsbl-2.uceprotect.net
27411dnsbl-3.uceprotect.net
23483spam.dnsbl.sorbs.net
22446bl.spameatingmonkey.net
21767bl.tiopan.com
19820truncate.gbudb.net
19337blackholes.five-ten-sg.com (union of all results)
19186dnsbl.sorbs.net (union of all results)
18981hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18220ddnsbl.internetdefensesystems.com
17505bl.mailspike.net (result 127.0.0.11 = very bad reputation)
16944bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
16798psbl.surriel.com
14857dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10227bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10043blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
9364ubl.unsubscore.com
7811db.wpbl.info
7787blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6794bl.spamcop.net
6077hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5788bl.score.senderscore.com
5704dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5588list.dnswl.org (not a blacklist!)
5358no-more-funn.moensted.dk (union of all results)
4183wl.mailspike.net (union of all results) (not a blacklist!)
3926bl.mailspike.net (result 127.0.0.12 = bad reputation)
3887zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3430dnsbl.inps.de
3381ix.dnsbl.manitu.net
3161hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3049ips.backscatterer.org
2625no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2577no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2484wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2357hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1843korea.services.net
1686wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1483blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1463spamsources.fabel.dk
1430hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1428bl.spamcannibal.org
1225mail-abuse.blacklist.jippg.org
824zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
824zen.spamhaus.org (union of SBL and SBLCSS results)
753l2.bbfh.ext.sorbs.net
627accredit.habeas.com (not a blacklist!)
568query.bondedsender.org (not a blacklist!)
473l1.bbfh.ext.sorbs.net
462dnsbl.njabl.org (union of all results)
438aspews.ext.sorbs.net
381tr.countries.nerd.dk
351dnsbl.njabl.org (result 127.0.0.9 = open proxy)
296dnsbl.sorbs.net (result 127.0.0.6 = spam source)
236iadb2.isipp.com (not a blacklist!)
210iadb.isipp.com (not a blacklist!)
181dnsbl.ahbl.org (union of all results)
119hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
97dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
86no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
75dnsbl.njabl.org (result 127.0.0.2 = open relay)
71no-more-funn.moensted.dk (result 127.0.0.9 = misc)
61dnsbl.ahbl.org (result 127.0.0.4 = spam source)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36dnsbl.njabl.org (result 127.0.0.4 = spam source)
33no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
32tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32tor.dnsbl.sectoor.de (union of all results)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
23dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
15swl.spamhaus.org (union of all results) (not a blacklist!)
13wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
12bl.deadbeef.com
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4dnsbl-0.uceprotect.net
4multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
56181(total number of IP addresses whose names were tested, including 174 at SDSC)
30820hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25096hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21572(union of most domain zones)
18157abuse.rfc-ignorant.org
15130l1.apews.org
7112whois.rfc-ignorant.org (union of all results)
5690whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4527hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2966hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1422whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
722hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
657hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
454dbl.spamhaus.org (result 127.0.1.2 = spam source)
454dbl.spamhaus.org (union of all results)
338hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
303hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
245urired.spameatingmonkey.net
175hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
53postmaster.rfc-ignorant.org
42bogusmx.rfc-ignorant.org
24multi.surbl.org
21dsn.rfc-ignorant.org (zone not intended for this use)
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17rhsbl.ahbl.org
16dob.sibl.support-intelligence.net
14multi.uribl.com (result 127.0.0.2 = spam resource)
14multi.uribl.com (union of all results)
13fresh.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
25120(total number of domains tested, including 136 at SDSC)
17264hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7012(union of most domain zones)
3783hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3078whois.rfc-ignorant.org (union of all results)
2939whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2627hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2276hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2149hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1491dbl.spamhaus.org (result 127.0.1.2 = spam source)
1491dbl.spamhaus.org (union of all results)
1407abuse.rfc-ignorant.org
788hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
753postmaster.rfc-ignorant.org
706urired.spameatingmonkey.net
631l1.apews.org
606multi.surbl.org
520multi.uribl.com (union of all results)
515multi.uribl.com (result 127.0.0.2 = spam resource)
491bogusmx.rfc-ignorant.org
338hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
267dsn.rfc-ignorant.org
149hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
139whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
127dob.sibl.support-intelligence.net
105fresh.spameatingmonkey.net
15rhsbl.ahbl.org
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6ex.dnsbl.org
4multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 May 2011.