Blacklists Compared

21 May 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
50467(total number of IP addresses tested, including 175 at SDSC)
47205(union of most IP zones)
38220b.barracudacentral.org
37169l2.apews.org
36448zen.spamhaus.org (union of all results)
34895cbl.abuseat.org
34891zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29176bl.mailspike.net (union of all results)
29073hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
27859dnsbl-1.uceprotect.net
23637zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
21996dnsbl-2.uceprotect.net
21990dnsbl-3.uceprotect.net
20226bl.tiopan.com
19054hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18163ddnsbl.internetdefensesystems.com
18128bl.spameatingmonkey.net
17211blackholes.five-ten-sg.com (union of all results)
16249truncate.gbudb.net
15808spam.dnsbl.sorbs.net
15409psbl.surriel.com
15175bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12768dnsbl.sorbs.net (union of all results)
12046bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11468ubl.unsubscore.com
9934bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9154blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8408dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6638db.wpbl.info
6496blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6123bl.spamcop.net
5716bl.score.senderscore.com
5639list.dnswl.org (not a blacklist!)
5320no-more-funn.moensted.dk (union of all results)
5044dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3771wl.mailspike.net (union of all results) (not a blacklist!)
3603bl.mailspike.net (result 127.0.0.12 = bad reputation)
3601ix.dnsbl.manitu.net
3485hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3415ips.backscatterer.org
3216zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3060dnsbl.inps.de
2978no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2794hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2506hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2275wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2155no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1996korea.services.net
1534blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1487wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1440hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1298bl.spamcannibal.org
1280spamsources.fabel.dk
1002mail-abuse.blacklist.jippg.org
725zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
725zen.spamhaus.org (union of SBL and SBLCSS results)
616l2.bbfh.ext.sorbs.net
584accredit.habeas.com (not a blacklist!)
539query.bondedsender.org (not a blacklist!)
409aspews.ext.sorbs.net
403dnsbl.njabl.org (union of all results)
318tr.countries.nerd.dk
286dnsbl.njabl.org (result 127.0.0.9 = open proxy)
196l1.bbfh.ext.sorbs.net
190iadb2.isipp.com (not a blacklist!)
166iadb.isipp.com (not a blacklist!)
112hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
111dnsbl.ahbl.org (union of all results)
88no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
82dnsbl.njabl.org (result 127.0.0.2 = open relay)
72no-more-funn.moensted.dk (result 127.0.0.9 = misc)
62dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
62dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
62dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
61dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
41no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
35dnsbl.njabl.org (result 127.0.0.4 = spam source)
33dnsbl.ahbl.org (result 127.0.0.4 = spam source)
32tor.dnsbl.sectoor.de (union of all results)
31tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
27blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
15swl.spamhaus.org (union of all results) (not a blacklist!)
11bl.deadbeef.com
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
3multi.surbl.org
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl-0.uceprotect.net
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1multi.uribl.com (union of all results)
1spamguard.leadmon.net (union of all results)
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
50467(total number of IP addresses whose names were tested, including 175 at SDSC)
29139hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23409hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19467(union of most domain zones)
16496abuse.rfc-ignorant.org
13013l1.apews.org
5746whois.rfc-ignorant.org (union of all results)
4477whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3823hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2952hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1273whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
516hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
329hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
310hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
230urired.spameatingmonkey.net
220dbl.spamhaus.org (result 127.0.1.2 = spam source)
220dbl.spamhaus.org (union of all results)
155hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
140hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43postmaster.rfc-ignorant.org
40fresh.spameatingmonkey.net
37bogusmx.rfc-ignorant.org
32multi.surbl.org
19multi.uribl.com (result 127.0.0.2 = spam resource)
19multi.uribl.com (union of all results)
18rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8dsn.rfc-ignorant.org (zone not intended for this use)
1dob.sibl.support-intelligence.net
1bl.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
24202(total number of domains tested, including 141 at SDSC)
17657hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6226(union of most domain zones)
4045hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2847whois.rfc-ignorant.org (union of all results)
2693whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2415hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2229hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1570abuse.rfc-ignorant.org
932hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
827postmaster.rfc-ignorant.org
799hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
788dbl.spamhaus.org (result 127.0.1.2 = spam source)
788dbl.spamhaus.org (union of all results)
664l1.apews.org
636multi.surbl.org
532bogusmx.rfc-ignorant.org
523urired.spameatingmonkey.net
510multi.uribl.com (union of all results)
504multi.uribl.com (result 127.0.0.2 = spam resource)
389hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
318dsn.rfc-ignorant.org
154whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
128fresh.spameatingmonkey.net
88dob.sibl.support-intelligence.net
48rhsbl.ahbl.org
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
8ex.dnsbl.org
5multi.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 23 May 2011.