Blacklists Compared

7 May 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
56471(total number of IP addresses tested, including 195 at SDSC)
53036(union of most IP zones)
43953b.barracudacentral.org
43129l2.apews.org
42615zen.spamhaus.org (union of all results)
40112zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
40112cbl.abuseat.org
34248hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
32211bl.mailspike.net (union of all results)
29332dnsbl-1.uceprotect.net
28291zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
27638dnsbl-2.uceprotect.net
26712dnsbl-3.uceprotect.net
21286bl.spameatingmonkey.net
20176bl.tiopan.com
19483blackholes.five-ten-sg.com (union of all results)
19248ddnsbl.internetdefensesystems.com
19111spam.dnsbl.sorbs.net
18547truncate.gbudb.net
18467hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18157bl.mailspike.net (result 127.0.0.11 = very bad reputation)
16105psbl.surriel.com
15905dnsbl.sorbs.net (union of all results)
14177bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11110ubl.unsubscore.com
10544dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10036blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8955bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7807blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6736db.wpbl.info
6413bl.spamcop.net
6189dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5763list.dnswl.org (not a blacklist!)
5645hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5569no-more-funn.moensted.dk (union of all results)
5233bl.score.senderscore.com
4288bl.mailspike.net (result 127.0.0.12 = bad reputation)
4021wl.mailspike.net (union of all results) (not a blacklist!)
3713zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3644ix.dnsbl.manitu.net
3269ips.backscatterer.org
3213dnsbl.inps.de
2963hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2779no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2622no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2477wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2440hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1778korea.services.net
1617blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1552spamsources.fabel.dk
1527wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1471hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1378bl.spamcannibal.org
1214l2.bbfh.ext.sorbs.net
1164zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1164zen.spamhaus.org (union of SBL and SBLCSS results)
1026mail-abuse.blacklist.jippg.org
653accredit.habeas.com (not a blacklist!)
603query.bondedsender.org (not a blacklist!)
517l1.bbfh.ext.sorbs.net
488dnsbl.njabl.org (union of all results)
418tr.countries.nerd.dk
415aspews.ext.sorbs.net
388dnsbl.njabl.org (result 127.0.0.9 = open proxy)
315dnsbl.sorbs.net (result 127.0.0.6 = spam source)
257iadb2.isipp.com (not a blacklist!)
233iadb.isipp.com (not a blacklist!)
152dnsbl.ahbl.org (union of all results)
136hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
88no-more-funn.moensted.dk (result 127.0.0.9 = misc)
86dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
74no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
72dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
72dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
62dnsbl.njabl.org (result 127.0.0.2 = open relay)
55tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
55tor.dnsbl.sectoor.de (union of all results)
44dnsbl.ahbl.org (result 127.0.0.4 = spam source)
38dnsbl.njabl.org (result 127.0.0.4 = spam source)
38no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
22blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
18swl.spamhaus.org (union of all results) (not a blacklist!)
17wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
13bl.deadbeef.com
11swl.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!)
5multi.surbl.org
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
56471(total number of IP addresses whose names were tested, including 195 at SDSC)
31108hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25238hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21189(union of most domain zones)
18181abuse.rfc-ignorant.org
15143l1.apews.org
6828whois.rfc-ignorant.org (union of all results)
5453whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4751hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3112hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1378whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
497hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
296hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
294hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
210dbl.spamhaus.org (result 127.0.1.2 = spam source)
210dbl.spamhaus.org (union of all results)
172urired.spameatingmonkey.net
145hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
113hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
68multi.surbl.org
43postmaster.rfc-ignorant.org
38bogusmx.rfc-ignorant.org
21fresh.spameatingmonkey.net
18multi.uribl.com (result 127.0.0.2 = spam resource)
18multi.uribl.com (union of all results)
17rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14dsn.rfc-ignorant.org (zone not intended for this use)
8dob.sibl.support-intelligence.net
2bl.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
22483(total number of domains tested, including 154 at SDSC)
15067hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5857(union of most domain zones)
3601hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2365whois.rfc-ignorant.org (union of all results)
2238whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2096hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1885hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1417hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1365abuse.rfc-ignorant.org
1159dbl.spamhaus.org (result 127.0.1.2 = spam source)
1159dbl.spamhaus.org (union of all results)
1053hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
865multi.surbl.org
709postmaster.rfc-ignorant.org
615l1.apews.org
556urired.spameatingmonkey.net
556multi.uribl.com (union of all results)
548multi.uribl.com (result 127.0.0.2 = spam resource)
448bogusmx.rfc-ignorant.org
352hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
268dsn.rfc-ignorant.org
136fresh.spameatingmonkey.net
127whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78dob.sibl.support-intelligence.net
59hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13rhsbl.ahbl.org
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
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 10 May 2011.