Blacklists Compared

11 February 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
40470(total number of IP addresses tested, including 174 at SDSC)
37647(union of most IP zones)
28319b.barracudacentral.org
28215l2.apews.org
26884zen.spamhaus.org (union of all results)
26149ip.v4bl.org
25439cbl.abuseat.org
25436zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
20640bl.tiopan.com
20010hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
19340spam.dnsbl.sorbs.net
16466zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
16145hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16137dnsbl-1.uceprotect.net
15579all.spamrats.com (union of all results)
13273dnsbl.sorbs.net (union of all results)
13153ubl.unsubscore.com
12895bl.mailspike.net (union of all results)
11692blackholes.five-ten-sg.com (union of all results)
11381dnsbl-3.uceprotect.net
11021dnsbl-2.uceprotect.net
10880bl.spameatingmonkey.net
10665psbl.surriel.com
8956truncate.gbudb.net
8940all.spamrats.com (result 127.0.0.36 = dialup)
7305dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6685all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5918list.dnswl.org (not a blacklist!)
5749bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
5722dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5685bl.mailspike.net (result 127.0.0.11 = very bad reputation)
5272bl.spamcop.net
5189blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5042blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4749db.wpbl.info
4684dnsbl.inps.de
4265bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3987bl.score.senderscore.com
3792wl.mailspike.net (union of all results) (not a blacklist!)
3429no-more-funn.moensted.dk (union of all results)
3427ips.backscatterer.org
3332hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3317zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2751hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2579ix.dnsbl.manitu.net
2465wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2429hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2019dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1965no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1765hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1454blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1414no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1322wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1219bl.spamcannibal.org
1191korea.services.net
800spamsources.fabel.dk
684accredit.habeas.com (not a blacklist!)
602query.bondedsender.org (not a blacklist!)
573zen.spamhaus.org (union of SBL and SBLCSS results)
554mail-abuse.blacklist.jippg.org
416zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
343l1.bbfh.ext.sorbs.net
338l2.bbfh.ext.sorbs.net
310aspews.ext.sorbs.net
256tr.countries.nerd.dk
248dnsbl.njabl.org (union of all results)
216iadb.isipp.com (not a blacklist!)
189dnsbl.njabl.org (result 127.0.0.9 = open proxy)
175dnsbl.ahbl.org (union of all results)
157zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
154hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
115dnsbl.ahbl.org (result 127.0.0.4 = spam source)
103iadb2.isipp.com (not a blacklist!)
50dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
45no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
44dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
44dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
44dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
38dnsbl.njabl.org (result 127.0.0.2 = open relay)
37tor.dnsbl.sectoor.de (union of all results)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
21dnsbl.njabl.org (result 127.0.0.4 = spam source)
16swl.spamhaus.org (union of all results) (not a blacklist!)
15hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10no-more-funn.moensted.dk (result 127.0.0.9 = misc)
10dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
8multi.surbl.org
7swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
6blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6spamguard.leadmon.net (union of all results)
5swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4dnsbl-0.uceprotect.net
4swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4bl.deadbeef.com
4multi.uribl.com (union of all results)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
40470(total number of IP addresses whose names were tested, including 174 at SDSC)
23802hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19444hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13945(union of most domain zones)
10919abuse.rfc-ignorant.org
9033l1.apews.org
5365whois.rfc-ignorant.org (union of all results)
4526whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3016hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2823hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
841whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
341hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
327hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
278dbl.spamhaus.org (result 127.0.1.2 = spam source)
278dbl.spamhaus.org (union of all results)
255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
234hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
222urired.spameatingmonkey.net
171hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
37postmaster.rfc-ignorant.org
28multi.surbl.org
28bogusmx.rfc-ignorant.org
26fresh.spameatingmonkey.net
23dob.sibl.support-intelligence.net
21rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
7dsn.rfc-ignorant.org (zone not intended for this use)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1bl.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
23600(total number of domains tested, including 115 at SDSC)
20192hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5312(union of most domain zones)
4144hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2519hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2353hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2085whois.rfc-ignorant.org (union of all results)
1956whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1509abuse.rfc-ignorant.org
796postmaster.rfc-ignorant.org
656dbl.spamhaus.org (union of all results)
654dbl.spamhaus.org (result 127.0.1.2 = spam source)
639hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
613hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
581l1.apews.org
534urired.spameatingmonkey.net
488bogusmx.rfc-ignorant.org
418multi.surbl.org
377multi.uribl.com (union of all results)
369multi.uribl.com (result 127.0.0.2 = spam resource)
363hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
292dsn.rfc-ignorant.org
129whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
91dob.sibl.support-intelligence.net
59fresh.spameatingmonkey.net
21hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 February 2012.