Blacklists Compared

19 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
58020(total number of IP addresses tested, including 174 at SDSC)
54670(union of most IP zones)
45606b.barracudacentral.org
44548l2.apews.org
44244zen.spamhaus.org (union of all results)
42884cbl.abuseat.org
42882zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
37658hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
35929bl.mailspike.net (union of all results)
34043dnsbl-1.uceprotect.net
29196zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
27827psbl.surriel.com
26787bl.spameatingmonkey.net
26271dnsbl-3.uceprotect.net
26138dnsbl-2.uceprotect.net
25935bl.tiopan.com
23990hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23041ddnsbl.internetdefensesystems.com
22416spam.dnsbl.sorbs.net
19202blackholes.five-ten-sg.com (union of all results)
19072dnsbl.sorbs.net (union of all results)
18664bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
14906bl.mailspike.net (result 127.0.0.11 = very bad reputation)
14091bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12327dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10775db.wpbl.info
10575blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8555ubl.unsubscore.com
7824dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7208blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6434bl.spamcop.net
6241no-more-funn.moensted.dk (union of all results)
5891dnsbl.inps.de
5617bl.mailspike.net (result 127.0.0.12 = bad reputation)
5367list.dnswl.org (not a blacklist!)
4832zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4062hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3814wl.mailspike.net (union of all results) (not a blacklist!)
3577ips.backscatterer.org
3457hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3378no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3242ix.dnsbl.manitu.net
2664no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2420wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2325hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1943dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1406bl.spamcannibal.org
1405blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1394spamsources.fabel.dk
1383wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1294mail-abuse.blacklist.jippg.org
1141korea.services.net
1077hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
996l2.bbfh.ext.sorbs.net
592accredit.habeas.com (not a blacklist!)
541dnsbl.njabl.org (union of all results)
510query.bondedsender.org (not a blacklist!)
422dnsbl.njabl.org (result 127.0.0.9 = open proxy)
399tr.countries.nerd.dk
383l1.bbfh.ext.sorbs.net
369aspews.ext.sorbs.net
234zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
234zen.spamhaus.org (union of SBL and SBLCSS results)
210dnsbl.ahbl.org (union of all results)
142bl.score.senderscore.com
132dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
121iadb2.isipp.com (not a blacklist!)
112hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
100no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
97iadb.isipp.com (not a blacklist!)
89no-more-funn.moensted.dk (result 127.0.0.9 = misc)
81dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
81dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
81dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
78dnsbl.njabl.org (result 127.0.0.2 = open relay)
53no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
52dnsbl.ahbl.org (result 127.0.0.4 = spam source)
41dnsbl.njabl.org (result 127.0.0.4 = spam source)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39tor.dnsbl.sectoor.de (union of all results)
26dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21swl.spamhaus.org (union of all results) (not a blacklist!)
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
12bl.deadbeef.com
11wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6multi.surbl.org
4spamguard.leadmon.net (union of all results)
3zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
3dnsbl-0.uceprotect.net
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.uribl.com (union of all results)
1wadb.isipp.com
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
58020(total number of IP addresses whose names were tested, including 174 at SDSC)
35414hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
29165hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24224(union of most domain zones)
20668abuse.rfc-ignorant.org
18411l1.apews.org
7829whois.rfc-ignorant.org (union of all results)
5853whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3801hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3796hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1977whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
618hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
539hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
321hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
235urired.spameatingmonkey.net
197dbl.spamhaus.org (result 127.0.1.2 = spam source)
197dbl.spamhaus.org (union of all results)
127hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
124hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
62multi.surbl.org
56postmaster.rfc-ignorant.org
33bogusmx.rfc-ignorant.org
29dsn.rfc-ignorant.org (zone not intended for this use)
28rhsbl.ahbl.org
25fresh.spameatingmonkey.net
22multi.uribl.com (union of all results)
21multi.uribl.com (result 127.0.0.2 = spam resource)
15dob.sibl.support-intelligence.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
24280(total number of domains tested, including 142 at SDSC)
21501hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8431(union of most domain zones)
5013hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4653whois.rfc-ignorant.org (union of all results)
4190whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2789hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2461abuse.rfc-ignorant.org
2417hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1310postmaster.rfc-ignorant.org
1208l1.apews.org
942hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
688urired.spameatingmonkey.net
675dbl.spamhaus.org (result 127.0.1.2 = spam source)
675dbl.spamhaus.org (union of all results)
516bogusmx.rfc-ignorant.org
512hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
463whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
452multi.surbl.org
385hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
357multi.uribl.com (union of all results)
348multi.uribl.com (result 127.0.0.2 = spam resource)
323dsn.rfc-ignorant.org
150fresh.spameatingmonkey.net
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
18rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11dob.sibl.support-intelligence.net
9ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 21 March 2011.