Blacklists Compared

20 November 2010

[ 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
122305(total number of IP addresses tested, including 165 at SDSC)
118634(union of most IP zones)
110031b.barracudacentral.org
108622zen.spamhaus.org (union of all results)
104394l2.apews.org
101238zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
101224cbl.abuseat.org
85702hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
80958dnsbl-1.uceprotect.net
69963dnsbl-2.uceprotect.net
68406dnsbl-3.uceprotect.net
68220zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
67878psbl.surriel.com
67315bl.mailspike.net (union of all results)
62394bl.spameatingmonkey.net
55343bl.tiopan.com
54282ubl.unsubscore.com
51389spam.dnsbl.sorbs.net
46549hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
38560blackholes.five-ten-sg.com (union of all results)
33498dnsbl.sorbs.net (union of all results)
32691bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
30113bl.score.senderscore.com
28882db.wpbl.info
28863bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
26712bl.spamcop.net
26446blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
21410dnsbl.sorbs.net (result 127.0.0.10 = dialup)
16576zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
15941ix.dnsbl.manitu.net
15900bl.mailspike.net (result 127.0.0.11 = very bad reputation)
14264dnsbl.inps.de
13426no-more-funn.moensted.dk (union of all results)
12224hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12164mail-abuse.blacklist.jippg.org
10810blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9899dnsbl.sorbs.net (result 127.0.0.6 = spam source)
9049no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
8265bl.mailspike.net (result 127.0.0.12 = bad reputation)
5437list.dnswl.org (not a blacklist!)
4601wl.mailspike.net (union of all results) (not a blacklist!)
4363dnsbl.ahbl.org (union of all results)
3921dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3849no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3583ips.backscatterer.org
3350hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3042dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2975bl.spamcannibal.org
2912wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2571korea.services.net
2553spamsources.fabel.dk
2223hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1632wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1278blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1113dnsbl.njabl.org (union of all results)
1088hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
896dnsbl.njabl.org (result 127.0.0.9 = open proxy)
637accredit.habeas.com (not a blacklist!)
612l2.bbfh.ext.sorbs.net
555query.bondedsender.org (not a blacklist!)
520tr.countries.nerd.dk
470aspews.ext.sorbs.net
377no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
362zen.spamhaus.org (union of SBL and SBLCSS results)
360dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
356zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
272l1.bbfh.ext.sorbs.net
163dnsbl.njabl.org (result 127.0.0.2 = open relay)
155iadb2.isipp.com (not a blacklist!)
153dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
153dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
153dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
151no-more-funn.moensted.dk (result 127.0.0.9 = misc)
128iadb.isipp.com (not a blacklist!)
104hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
87no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
82dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
69tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
69tor.dnsbl.sectoor.de (union of all results)
56wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
54dnsbl.njabl.org (result 127.0.0.4 = spam source)
35bl.deadbeef.com
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15swl.spamhaus.org (union of all results) (not a blacklist!)
13spamguard.leadmon.net (union of all results)
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7multi.surbl.org
6zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
3dnsbl-0.uceprotect.net
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
122305(total number of IP addresses whose names were tested, including 165 at SDSC)
72423hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
62241hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
54090(union of most domain zones)
47551abuse.rfc-ignorant.org
46865l1.apews.org
18318whois.rfc-ignorant.org (union of all results)
13459whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6449hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4859whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4300hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2242hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
781hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
317urired.spameatingmonkey.net
279hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
279dbl.spamhaus.org
163hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
74rhsbl.ahbl.org
49postmaster.rfc-ignorant.org
40multi.surbl.org
22dsn.rfc-ignorant.org (zone not intended for this use)
22bogusmx.rfc-ignorant.org
18fresh.spameatingmonkey.net
18hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16dob.sibl.support-intelligence.net
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
60476(total number of domains tested, including 121 at SDSC)
50541hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11432(union of most domain zones)
6293hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5986hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
3850whois.rfc-ignorant.org (union of all results)
3607whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3225hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3084hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3015abuse.rfc-ignorant.org
2797urired.spameatingmonkey.net
1741postmaster.rfc-ignorant.org
1337dbl.spamhaus.org
1262hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1165l1.apews.org
854multi.surbl.org
619bogusmx.rfc-ignorant.org
503multi.uribl.com (union of all results)
493multi.uribl.com (result 127.0.0.2 = spam resource)
470hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
316dsn.rfc-ignorant.org
243whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
155hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
93dob.sibl.support-intelligence.net
72fresh.spameatingmonkey.net
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 November 2010.