Blacklists Compared

4 December 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
109442(total number of IP addresses tested, including 164 at SDSC)
105837(union of most IP zones)
97213b.barracudacentral.org
95857zen.spamhaus.org (union of all results)
92790l2.apews.org
91317zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
91305cbl.abuseat.org
77129hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
73357dnsbl-1.uceprotect.net
68034bl.mailspike.net (union of all results)
62076dnsbl-2.uceprotect.net
61874psbl.surriel.com
60528dnsbl-3.uceprotect.net
60159zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
57278bl.spameatingmonkey.net
51517bl.tiopan.com
43741spam.dnsbl.sorbs.net
42471hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
38739bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
38114blackholes.five-ten-sg.com (union of all results)
30734bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27458db.wpbl.info
25097bl.score.senderscore.com
24003blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
23030bl.spamcop.net
22845bl.mailspike.net (result 127.0.0.11 = very bad reputation)
21556dnsbl.sorbs.net (union of all results)
18852dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14993ix.dnsbl.manitu.net
14651zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
13661dnsbl.inps.de
12736ubl.unsubscore.com
12575blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
11778no-more-funn.moensted.dk (union of all results)
11559mail-abuse.blacklist.jippg.org
11111hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8801bl.mailspike.net (result 127.0.0.12 = bad reputation)
7840no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5606list.dnswl.org (not a blacklist!)
3774ips.backscatterer.org
3714wl.mailspike.net (union of all results) (not a blacklist!)
3537no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3388hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2700dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2691bl.spamcannibal.org
2472korea.services.net
2352hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2346wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2250spamsources.fabel.dk
1512blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1323wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1125hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
929dnsbl.njabl.org (union of all results)
756tr.countries.nerd.dk
754dnsbl.njabl.org (result 127.0.0.9 = open proxy)
657l2.bbfh.ext.sorbs.net
647accredit.habeas.com (not a blacklist!)
559zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
559zen.spamhaus.org (union of SBL and SBLCSS results)
527query.bondedsender.org (not a blacklist!)
508aspews.ext.sorbs.net
441dnsbl.ahbl.org (union of all results)
405l1.bbfh.ext.sorbs.net
339dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
294no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
160iadb2.isipp.com (not a blacklist!)
134iadb.isipp.com (not a blacklist!)
130dnsbl.njabl.org (result 127.0.0.2 = open relay)
126dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
126dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
126dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
105no-more-funn.moensted.dk (result 127.0.0.9 = misc)
102hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
83dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
70tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
70no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
70tor.dnsbl.sectoor.de (union of all results)
45wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
45dnsbl.njabl.org (result 127.0.0.4 = spam source)
36bl.deadbeef.com
24blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20swl.spamhaus.org (union of all results) (not a blacklist!)
19dnsbl.ahbl.org (result 127.0.0.4 = spam source)
12swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
12multi.surbl.org
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5spamguard.leadmon.net (union of all results)
4dnsbl-0.uceprotect.net
3multi.uribl.com (result 127.0.0.2 = spam resource)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3multi.uribl.com (union of all results)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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
109442(total number of IP addresses whose names were tested, including 164 at SDSC)
64344hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
54651hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
48526(union of most domain zones)
41155abuse.rfc-ignorant.org
40492l1.apews.org
15654whois.rfc-ignorant.org (union of all results)
11380whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6438hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4615dob.sibl.support-intelligence.net
4277whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4129hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1801hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
767hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
309hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
308urired.spameatingmonkey.net
264dbl.spamhaus.org
154hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
83hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
75multi.surbl.org
51postmaster.rfc-ignorant.org
45rhsbl.ahbl.org
24dsn.rfc-ignorant.org (zone not intended for this use)
24bogusmx.rfc-ignorant.org
21multi.uribl.com (result 127.0.0.2 = spam resource)
21multi.uribl.com (union of all results)
18fresh.spameatingmonkey.net
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4bl.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
57048(total number of domains tested, including 136 at SDSC)
51877hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11130(union of most domain zones)
5528hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2987urired.spameatingmonkey.net
2743hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2697whois.rfc-ignorant.org (union of all results)
2631abuse.rfc-ignorant.org
2518hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2491whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2193postmaster.rfc-ignorant.org
1834hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1813dbl.spamhaus.org
1062hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1057l1.apews.org
849multi.surbl.org
725bogusmx.rfc-ignorant.org
531multi.uribl.com (union of all results)
520multi.uribl.com (result 127.0.0.2 = spam resource)
423hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
282dsn.rfc-ignorant.org
206whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
88dob.sibl.support-intelligence.net
75fresh.spameatingmonkey.net
29hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11ex.dnsbl.org
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 December 2010.