Blacklists Compared

29 September 2012

[ 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
25352(total number of IP addresses tested, including 152 at SDSC)
20543(union of most IP zones)
15460ip.v4bl.org
15454hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13628b.barracudacentral.org
13533l2.apews.org
13290bl.tiopan.com
12955zen.spamhaus.org (union of all results)
11567zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
11565cbl.abuseat.org
10746hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
10250wl.mailspike.net (union of all results) (not a blacklist!)
8035dnsbl-1.uceprotect.net
8015psbl.surriel.com
6484zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
6431all.spamrats.com (union of all results)
6370list.dnswl.org (not a blacklist!)
6064spam.dnsbl.sorbs.net
6013wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5929ubl.unsubscore.com
5507bl.mailspike.net (union of all results)
5286dnsbl.inps.de
4651bl.mailspike.net (result 127.0.0.12 = bad reputation)
4302dnsbl-2.uceprotect.net
3714dnsbl.sorbs.net (union of all results)
3699dnsbl-3.uceprotect.net
3542bl.spameatingmonkey.net
3499wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3072all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3059all.spamrats.com (result 127.0.0.36 = dialup)
2841hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2832db.wpbl.info
2632hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2373dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
1938truncate.gbudb.net
1925zen.spamhaus.org (union of SBL and SBLCSS results)
1910ips.backscatterer.org
1808bl.spamcop.net
1675bl.score.senderscore.com
1533zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1475dnsbl.sorbs.net (result 127.0.0.10 = dialup)
1444hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1106zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1016all.s5h.net
976ix.dnsbl.manitu.net
863bl.spamcannibal.org
766accredit.habeas.com (not a blacklist!)
759bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
634query.bondedsender.org (not a blacklist!)
621hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
558bl.mailspike.net (result 127.0.0.11 = very bad reputation)
555wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
554spamsources.fabel.dk
500tr.countries.nerd.dk
432korea.services.net
392zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
373mail-abuse.blacklist.jippg.org
310all.spamrats.com (result 127.0.0.38 = spam source)
297l2.bbfh.ext.sorbs.net
280aspews.ext.sorbs.net
242iadb.isipp.com (not a blacklist!)
187dnsbl.njabl.org (union of all results)
183wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
137dnsbl.ahbl.org (union of all results)
136hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
128dnsbl.njabl.org (result 127.0.0.9 = open proxy)
94dnsbl.ahbl.org (result 127.0.0.4 = spam source)
67bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
67iadb2.isipp.com (not a blacklist!)
63tor.dnsbl.sectoor.de (union of all results)
60tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
33dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
33dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
33dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
30dnsbl.njabl.org (result 127.0.0.2 = open relay)
29dnsbl.njabl.org (result 127.0.0.4 = spam source)
26dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9dnsbl.sorbs.net (result 127.0.0.6 = spam source)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8spamguard.leadmon.net (union of all results)
7spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.surbl.org
4multi.uribl.com (union of all results)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl-0.uceprotect.net
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
25352(total number of IP addresses whose names were tested, including 152 at SDSC)
15070hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12485hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4928(union of most domain zones)
3341l1.apews.org
3330abuse.rfc-ignorant.org
2727hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1935hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1104whois.rfc-ignorant.org (union of all results)
914whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
509dbl.spamhaus.org (result 127.0.1.2 = spam source)
509dbl.spamhaus.org (union of all results)
496hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
243hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
190whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
131hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
131hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
89bogusmx.rfc-ignorant.org
85hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
46urired.spameatingmonkey.net
41rhsbl.ahbl.org
30dob.sibl.support-intelligence.net
28multi.surbl.org
28fresh.spameatingmonkey.net
27multi.uribl.com (result 127.0.0.2 = spam resource)
27multi.uribl.com (union of all results)
15postmaster.rfc-ignorant.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1dsn.rfc-ignorant.org (zone not intended for this use)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
19284(total number of domains tested, including 109 at SDSC)
16351hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3832(union of most domain zones)
3659hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3066dbl.spamhaus.org (union of all results)
3063dbl.spamhaus.org (result 127.0.1.2 = spam source)
3058hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2362multi.surbl.org
1853hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1602hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1571multi.uribl.com (union of all results)
1551multi.uribl.com (result 127.0.0.2 = spam resource)
1181hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
501fresh.spameatingmonkey.net
475dob.sibl.support-intelligence.net
430l1.apews.org
245hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
150urired.spameatingmonkey.net
29hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
22rhsbl.ahbl.org
19multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11bogusmx.rfc-ignorant.org
6ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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 30 September 2012.