Blacklists Compared

26 March 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
48040(total number of IP addresses tested, including 157 at SDSC)
44800(union of most IP zones)
36255b.barracudacentral.org
36130l2.apews.org
34740zen.spamhaus.org (union of all results)
32992cbl.abuseat.org
32982zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29729hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
27799bl.mailspike.net (union of all results)
25660dnsbl-1.uceprotect.net
24219zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22249dnsbl-2.uceprotect.net
22100dnsbl-3.uceprotect.net
21818bl.tiopan.com
19459bl.spameatingmonkey.net
18195spam.dnsbl.sorbs.net
18006dnsbl.sorbs.net (union of all results)
17547hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17203blackholes.five-ten-sg.com (union of all results)
17131psbl.surriel.com
15969ddnsbl.internetdefensesystems.com
13932bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13075dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11782bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11698bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9307blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7462db.wpbl.info
6868ubl.unsubscore.com
6475blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5337list.dnswl.org (not a blacklist!)
5174bl.spamcop.net
5029dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4982no-more-funn.moensted.dk (union of all results)
4711hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4061wl.mailspike.net (union of all results) (not a blacklist!)
3494bl.mailspike.net (result 127.0.0.12 = bad reputation)
3428hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3194ips.backscatterer.org
3093dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3084zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2810dnsbl.inps.de
2460no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2450wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2282no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2141hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2127ix.dnsbl.manitu.net
1600wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1406korea.services.net
1397blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1264bl.spamcannibal.org
1203spamsources.fabel.dk
1151hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1065mail-abuse.blacklist.jippg.org
685l2.bbfh.ext.sorbs.net
601accredit.habeas.com (not a blacklist!)
527query.bondedsender.org (not a blacklist!)
489dnsbl.njabl.org (union of all results)
373dnsbl.njabl.org (result 127.0.0.9 = open proxy)
354aspews.ext.sorbs.net
346zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
346zen.spamhaus.org (union of SBL and SBLCSS results)
319bl.score.senderscore.com
276tr.countries.nerd.dk
202iadb2.isipp.com (not a blacklist!)
182l1.bbfh.ext.sorbs.net
178iadb.isipp.com (not a blacklist!)
154dnsbl.ahbl.org (union of all results)
112no-more-funn.moensted.dk (result 127.0.0.9 = misc)
105no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
81hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
80dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
75dnsbl.njabl.org (result 127.0.0.2 = open relay)
67dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
67dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
67dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
45dnsbl.ahbl.org (result 127.0.0.4 = spam source)
42tor.dnsbl.sectoor.de (union of all results)
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
41dnsbl.njabl.org (result 127.0.0.4 = spam source)
41no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
29dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17swl.spamhaus.org (union of all results) (not a blacklist!)
11wl.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!)
8bl.deadbeef.com
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6multi.surbl.org
4zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4dnsbl-0.uceprotect.net
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1multi.uribl.com (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
48040(total number of IP addresses whose names were tested, including 157 at SDSC)
24838hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
22619hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18583(union of most domain zones)
15895abuse.rfc-ignorant.org
13125l1.apews.org
6307whois.rfc-ignorant.org (union of all results)
4981whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3745hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3486hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2078hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1326whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
522hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
204dbl.spamhaus.org (result 127.0.1.2 = spam source)
204dbl.spamhaus.org (union of all results)
189urired.spameatingmonkey.net
140hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
105hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
78hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
58postmaster.rfc-ignorant.org
48bogusmx.rfc-ignorant.org
47multi.surbl.org
30dsn.rfc-ignorant.org (zone not intended for this use)
24fresh.spameatingmonkey.net
20rhsbl.ahbl.org
16dob.sibl.support-intelligence.net
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
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
24076(total number of domains tested, including 127 at SDSC)
9650hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7559(union of most domain zones)
6867hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
4289hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3097whois.rfc-ignorant.org (union of all results)
2947whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2646hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2174hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1806dbl.spamhaus.org (result 127.0.1.2 = spam source)
1806dbl.spamhaus.org (union of all results)
1553abuse.rfc-ignorant.org
1012fresh.spameatingmonkey.net
886postmaster.rfc-ignorant.org
872dob.sibl.support-intelligence.net
708hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
674l1.apews.org
498multi.surbl.org
484urired.spameatingmonkey.net
452bogusmx.rfc-ignorant.org
441multi.uribl.com (union of all results)
432multi.uribl.com (result 127.0.0.2 = spam resource)
394hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
308dsn.rfc-ignorant.org
201hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
150whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
17rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
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)
7ex.dnsbl.org
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 March 2011.