Blacklists Compared

2 February 2013

[ 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
37264(total number of IP addresses tested, including 171 at SDSC)
32845(union of most IP zones)
24947b.barracudacentral.org
24309l2.apews.org
23448zen.spamhaus.org (union of all results)
23287ip.v4bl.org
21202cbl.abuseat.org
21192zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
21022bl.tiopan.com
17221bl.mailspike.net (union of all results)
16151hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
15563zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
14244bl.mailspike.net (result 127.0.0.12 = bad reputation)
13710spam.dnsbl.sorbs.net
13508ubl.unsubscore.com
12434hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
11913dnsbl-1.uceprotect.net
11428dnsbl.inps.de
9760all.spamrats.com (union of all results)
9615dnsbl.sorbs.net (union of all results)
9131db.wpbl.info
8361psbl.surriel.com
8161wl.mailspike.net (union of all results) (not a blacklist!)
6951dnsbl-2.uceprotect.net
6914list.dnswl.org (not a blacklist!)
6812bl.spameatingmonkey.net
6439free.v4bl.org
6001truncate.gbudb.net
5653dnsbl-3.uceprotect.net
5499all.spamrats.com (result 127.0.0.36 = dialup)
5299wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4665dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4301dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4005all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3006bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3006hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2868hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2693bl.spamcop.net
2677hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2526wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2264ips.backscatterer.org
2098zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1947ix.dnsbl.manitu.net
1832bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1739all.s5h.net
1673dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1619hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1221bl.score.senderscore.com
1102bl.spamcannibal.org
1018zen.spamhaus.org (union of SBL and SBLCSS results)
766accredit.habeas.com (not a blacklist!)
618query.bondedsender.org (not a blacklist!)
598zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
484spamsources.fabel.dk
475korea.services.net
420zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
395mail-abuse.blacklist.jippg.org
381tr.countries.nerd.dk
301all.spamrats.com (result 127.0.0.38 = spam source)
279l2.bbfh.ext.sorbs.net
249iadb.isipp.com (not a blacklist!)
211wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
187bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
168dnsbl.ahbl.org (union of all results)
161dnsbl.njabl.org (union of all results)
139dnsbl.ahbl.org (result 127.0.0.4 = spam source)
125wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
118iadb2.isipp.com (not a blacklist!)
108dnsbl.njabl.org (result 127.0.0.9 = open proxy)
108hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
34dnsbl.njabl.org (result 127.0.0.2 = open relay)
24dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
24dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
24dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
21tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21tor.dnsbl.sectoor.de (union of all results)
19dnsbl.njabl.org (result 127.0.0.4 = spam source)
16dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
4dnsbl-0.uceprotect.net
3multi.surbl.org
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (union of all results)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
37264(total number of IP addresses whose names were tested, including 171 at SDSC)
21642hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16922hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6063l1.apews.org
2615hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2442hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2229(union of most domain zones)
923hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
686hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
531dbl.spamhaus.org (result 127.0.1.2 = spam source)
531dbl.spamhaus.org (union of all results)
297hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
169hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
150urired.spameatingmonkey.net
84hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
70dob.sibl.support-intelligence.net
66fresh.spameatingmonkey.net
42multi.uribl.com (union of all results)
41multi.uribl.com (result 127.0.0.2 = spam resource)
39multi.surbl.org
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26rhsbl.ahbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
19956(total number of domains tested, including 132 at SDSC)
16845hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3686hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3653(union of most domain zones)
2844hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1952dbl.spamhaus.org (union of all results)
1948dbl.spamhaus.org (result 127.0.1.2 = spam source)
1752hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1723hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1664hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1472multi.surbl.org
1058multi.uribl.com (union of all results)
1042multi.uribl.com (result 127.0.0.2 = spam resource)
970urired.spameatingmonkey.net
519l1.apews.org
451dob.sibl.support-intelligence.net
370fresh.spameatingmonkey.net
267hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
54hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
16hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 3 February 2013.