Blacklists Compared

23 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
54598(total number of IP addresses tested, including 174 at SDSC)
51274(union of most IP zones)
42354b.barracudacentral.org
40579l2.apews.org
40375zen.spamhaus.org (union of all results)
38427cbl.abuseat.org
38423zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33137hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
31748bl.mailspike.net (union of all results)
27102dnsbl-1.uceprotect.net
26817zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25113dnsbl-2.uceprotect.net
25016dnsbl-3.uceprotect.net
20700spam.dnsbl.sorbs.net
20585bl.tiopan.com
20529bl.spameatingmonkey.net
20335dnsbl.sorbs.net (union of all results)
20109truncate.gbudb.net
19923hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18947blackholes.five-ten-sg.com (union of all results)
16851ddnsbl.internetdefensesystems.com
15094bl.mailspike.net (result 127.0.0.11 = very bad reputation)
14523dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13852psbl.surriel.com
13417bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
12512bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9025blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8459blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6915ubl.unsubscore.com
6650db.wpbl.info
6472bl.spamcop.net
5761bl.score.senderscore.com
5517list.dnswl.org (not a blacklist!)
5460dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5112no-more-funn.moensted.dk (union of all results)
4241dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3858wl.mailspike.net (union of all results) (not a blacklist!)
3760hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3486bl.mailspike.net (result 127.0.0.12 = bad reputation)
3463zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3335hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3230ips.backscatterer.org
3190ix.dnsbl.manitu.net
3032dnsbl.inps.de
2470no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2454no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2346wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2193hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1574korea.services.net
1499wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1437blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1409spamsources.fabel.dk
1360hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1331bl.spamcannibal.org
1299mail-abuse.blacklist.jippg.org
1184zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1184zen.spamhaus.org (union of SBL and SBLCSS results)
1011l2.bbfh.ext.sorbs.net
618accredit.habeas.com (not a blacklist!)
565query.bondedsender.org (not a blacklist!)
452dnsbl.njabl.org (union of all results)
442aspews.ext.sorbs.net
388tr.countries.nerd.dk
339l1.bbfh.ext.sorbs.net
336dnsbl.njabl.org (result 127.0.0.9 = open proxy)
222iadb2.isipp.com (not a blacklist!)
201iadb.isipp.com (not a blacklist!)
157dnsbl.ahbl.org (union of all results)
116hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
88dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
83no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
82no-more-funn.moensted.dk (result 127.0.0.9 = misc)
75dnsbl.njabl.org (result 127.0.0.2 = open relay)
58dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
58dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
58dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
51dnsbl.ahbl.org (result 127.0.0.4 = spam source)
41dnsbl.njabl.org (result 127.0.0.4 = spam source)
40no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39tor.dnsbl.sectoor.de (union of all results)
24blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
15swl.spamhaus.org (union of all results) (not a blacklist!)
14bl.deadbeef.com
13wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
10swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3dnsbl-0.uceprotect.net
3multi.surbl.org
2zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
2spamguard.leadmon.net (union of all results)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = 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
54598(total number of IP addresses whose names were tested, including 174 at SDSC)
30496hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24900hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21877(union of most domain zones)
17673abuse.rfc-ignorant.org
14438l1.apews.org
6482whois.rfc-ignorant.org (union of all results)
5189whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3774hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3577hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1423hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1351dbl.spamhaus.org (result 127.0.1.2 = spam source)
1351dbl.spamhaus.org (union of all results)
1330hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1294whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
759dob.sibl.support-intelligence.net
412fresh.spameatingmonkey.net
281hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
258urired.spameatingmonkey.net
153hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
136hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
78hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
57postmaster.rfc-ignorant.org
49bogusmx.rfc-ignorant.org
31dsn.rfc-ignorant.org (zone not intended for this use)
21rhsbl.ahbl.org
14multi.surbl.org
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
2bl.deadbeef.com
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
24258(total number of domains tested, including 131 at SDSC)
16893hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7389(union of most domain zones)
3999hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3488whois.rfc-ignorant.org (union of all results)
3331whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2561hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2414hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2223hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1586abuse.rfc-ignorant.org
1280dbl.spamhaus.org (union of all results)
1279dbl.spamhaus.org (result 127.0.1.2 = spam source)
1157hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
928multi.surbl.org
873multi.uribl.com (union of all results)
862multi.uribl.com (result 127.0.0.2 = spam resource)
821postmaster.rfc-ignorant.org
677l1.apews.org
664urired.spameatingmonkey.net
510bogusmx.rfc-ignorant.org
362hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
294dsn.rfc-ignorant.org
220hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
168fresh.spameatingmonkey.net
157whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
150dob.sibl.support-intelligence.net
22rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9ex.dnsbl.org
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)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 April 2011.