Blacklists Compared

24 December 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
47449(total number of IP addresses tested, including 182 at SDSC)
44809(union of most IP zones)
36124l2.apews.org
35784b.barracudacentral.org
34567zen.spamhaus.org (union of all results)
32647cbl.abuseat.org
32646zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29729ip.v4bl.org
25766spam.dnsbl.sorbs.net
24377hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23912bl.tiopan.com
22334zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
20466dnsbl-1.uceprotect.net
19896dnsbl.sorbs.net (union of all results)
18401dnsbl-3.uceprotect.net
18371dnsbl-2.uceprotect.net
17026truncate.gbudb.net
16734bl.mailspike.net (union of all results)
14975hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14638bl.spameatingmonkey.net
13771blackholes.five-ten-sg.com (union of all results)
11474dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10850ix.dnsbl.manitu.net
9170bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7852dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7507psbl.surriel.com
7156bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6593blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5939list.dnswl.org (not a blacklist!)
5689blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5661hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5546bl.spamcop.net
5281ubl.unsubscore.com
5238dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5220db.wpbl.info
5017zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4145no-more-funn.moensted.dk (union of all results)
3794wl.mailspike.net (union of all results) (not a blacklist!)
3332bl.score.senderscore.com
3106dnsbl.inps.de
2916hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2592ips.backscatterer.org
2478hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2456wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2289no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1701no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1628hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1483blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1335wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1325korea.services.net
1134bl.spamcannibal.org
1056spamsources.fabel.dk
896bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
673accredit.habeas.com (not a blacklist!)
629query.bondedsender.org (not a blacklist!)
566mail-abuse.blacklist.jippg.org
441l2.bbfh.ext.sorbs.net
441l1.bbfh.ext.sorbs.net
386dnsbl.njabl.org (union of all results)
371zen.spamhaus.org (union of SBL and SBLCSS results)
302dnsbl.njabl.org (result 127.0.0.9 = open proxy)
269zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
239aspews.ext.sorbs.net
235dnsbl.ahbl.org (union of all results)
232tr.countries.nerd.dk
207iadb.isipp.com (not a blacklist!)
168hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
137dnsbl.ahbl.org (result 127.0.0.4 = spam source)
113iadb2.isipp.com (not a blacklist!)
102zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
101no-more-funn.moensted.dk (result 127.0.0.9 = misc)
74dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
74dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
74dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
74dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
50dnsbl.njabl.org (result 127.0.0.2 = open relay)
49no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
34tor.dnsbl.sectoor.de (union of all results)
32tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
24dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
20swl.spamhaus.org (union of all results) (not a blacklist!)
19hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9bl.deadbeef.com
6multi.surbl.org
6blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
5spamguard.leadmon.net (union of all results)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3multi.uribl.com (union of all results)
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
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
47449(total number of IP addresses whose names were tested, including 182 at SDSC)
25170hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20291hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16334(union of most domain zones)
13428abuse.rfc-ignorant.org
10760l1.apews.org
6030whois.rfc-ignorant.org (union of all results)
5086whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3640hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2498hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
944whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
327hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
325hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
298dbl.spamhaus.org (result 127.0.1.2 = spam source)
298dbl.spamhaus.org (union of all results)
239hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
198hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
165urired.spameatingmonkey.net
106hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36postmaster.rfc-ignorant.org
30fresh.spameatingmonkey.net
26bogusmx.rfc-ignorant.org
21dob.sibl.support-intelligence.net
19rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9multi.surbl.org
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
7dsn.rfc-ignorant.org (zone not intended for this use)
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
17847(total number of domains tested, including 160 at SDSC)
14390hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4769(union of most domain zones)
3648hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1886hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1883whois.rfc-ignorant.org (union of all results)
1839hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1775whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1321abuse.rfc-ignorant.org
830hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
727postmaster.rfc-ignorant.org
693dbl.spamhaus.org (result 127.0.1.2 = spam source)
693dbl.spamhaus.org (union of all results)
631hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
519l1.apews.org
458multi.surbl.org
435multi.uribl.com (union of all results)
429urired.spameatingmonkey.net
424multi.uribl.com (result 127.0.0.2 = spam resource)
398bogusmx.rfc-ignorant.org
312hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
247dsn.rfc-ignorant.org
227hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
112dob.sibl.support-intelligence.net
108whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
69fresh.spameatingmonkey.net
20rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 December 2011.