Blacklists Compared

16 July 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
42589(total number of IP addresses tested, including 171 at SDSC)
39410(union of most IP zones)
31206l2.apews.org
30357b.barracudacentral.org
28960zen.spamhaus.org (union of all results)
27098zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27098cbl.abuseat.org
24138hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23563bl.mailspike.net (union of all results)
20193dnsbl-1.uceprotect.net
19681spam.dnsbl.sorbs.net
18493zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
17605bl.tiopan.com
17356dnsbl-2.uceprotect.net
17276dnsbl-3.uceprotect.net
17067hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15298ddnsbl.internetdefensesystems.com
15094blackholes.five-ten-sg.com (union of all results)
14373truncate.gbudb.net
14073bl.spameatingmonkey.net
12274psbl.surriel.com
12249dnsbl.sorbs.net (union of all results)
11616bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11008bl.mailspike.net (result 127.0.0.11 = very bad reputation)
10297ubl.unsubscore.com
9349bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8370blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6917dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5553list.dnswl.org (not a blacklist!)
5157db.wpbl.info
5086blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4463bl.spamcop.net
4195no-more-funn.moensted.dk (union of all results)
4097bl.score.senderscore.com
3907zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3840dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3582wl.mailspike.net (union of all results) (not a blacklist!)
3380ix.dnsbl.manitu.net
2864hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2843hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2789dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2705bl.mailspike.net (result 127.0.0.12 = bad reputation)
2575hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2564ips.backscatterer.org
2409dnsbl.inps.de
2346no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2253wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1725no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1603blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1564hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1406korea.services.net
1322wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1105bl.spamcannibal.org
1030spamsources.fabel.dk
950mail-abuse.blacklist.jippg.org
575accredit.habeas.com (not a blacklist!)
537query.bondedsender.org (not a blacklist!)
469zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
469zen.spamhaus.org (union of SBL and SBLCSS results)
406dnsbl.njabl.org (union of all results)
332aspews.ext.sorbs.net
280dnsbl.njabl.org (result 127.0.0.9 = open proxy)
270l2.bbfh.ext.sorbs.net
241tr.countries.nerd.dk
222iadb2.isipp.com (not a blacklist!)
204iadb.isipp.com (not a blacklist!)
172dnsbl.ahbl.org (union of all results)
123l1.bbfh.ext.sorbs.net
99dnsbl.ahbl.org (result 127.0.0.4 = spam source)
65dnsbl.njabl.org (result 127.0.0.2 = open relay)
65no-more-funn.moensted.dk (result 127.0.0.9 = misc)
62dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
62dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
62dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
61dnsbl.njabl.org (result 127.0.0.4 = spam source)
55dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
51no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
44hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
36no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
35blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24swl.spamhaus.org (union of all results) (not a blacklist!)
22tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
22tor.dnsbl.sectoor.de (union of all results)
18dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9multi.surbl.org
8swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
7bl.deadbeef.com
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4spamguard.leadmon.net (union of all results)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2dnsbl-0.uceprotect.net
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
42589(total number of IP addresses whose names were tested, including 171 at SDSC)
23894hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20068hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15596(union of most domain zones)
12420abuse.rfc-ignorant.org
10144l1.apews.org
5977whois.rfc-ignorant.org (union of all results)
4975whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3055hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2888hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1004whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
446hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
284hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
280hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
250dbl.spamhaus.org (result 127.0.1.2 = spam source)
250dbl.spamhaus.org (union of all results)
156urired.spameatingmonkey.net
149hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
43postmaster.rfc-ignorant.org
38hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
37bogusmx.rfc-ignorant.org
27multi.surbl.org
23rhsbl.ahbl.org
16dob.sibl.support-intelligence.net
13fresh.spameatingmonkey.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10multi.uribl.com (union of all results)
9multi.uribl.com (result 127.0.0.2 = spam resource)
6dsn.rfc-ignorant.org (zone not intended for this use)
4bl.deadbeef.com
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
23400(total number of domains tested, including 138 at SDSC)
20177hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6435(union of most domain zones)
4072hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3407whois.rfc-ignorant.org (union of all results)
3265whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2209hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2092hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1427abuse.rfc-ignorant.org
801hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
792postmaster.rfc-ignorant.org
649l1.apews.org
646hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
546bogusmx.rfc-ignorant.org
492urired.spameatingmonkey.net
484dbl.spamhaus.org (result 127.0.1.2 = spam source)
484dbl.spamhaus.org (union of all results)
423multi.surbl.org
358hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
298multi.uribl.com (union of all results)
291multi.uribl.com (result 127.0.0.2 = spam resource)
291dsn.rfc-ignorant.org
142whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
57fresh.spameatingmonkey.net
28hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11ex.dnsbl.org
5multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dob.sibl.support-intelligence.net
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 July 2011.