Blacklists Compared

8 October 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
59513(total number of IP addresses tested, including 218 at SDSC)
56656(union of most IP zones)
47900b.barracudacentral.org
47183l2.apews.org
46711zen.spamhaus.org (union of all results)
45191zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
45190cbl.abuseat.org
41294ddnsbl.internetdefensesystems.com
41278hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
35481bl.mailspike.net (union of all results)
32751dnsbl-1.uceprotect.net
32264dnsbl-2.uceprotect.net
31585dnsbl-3.uceprotect.net
31509zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
28314spam.dnsbl.sorbs.net
25382truncate.gbudb.net
25364bl.tiopan.com
25298dnsbl.sorbs.net (union of all results)
21882bl.spameatingmonkey.net
21806hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18487psbl.surriel.com
18320ubl.unsubscore.com
17628dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17442blackholes.five-ten-sg.com (union of all results)
16915bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15833bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9730dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7972blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7932blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7639bl.spamcop.net
7308db.wpbl.info
6486hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5978bl.score.senderscore.com
5902zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5728list.dnswl.org (not a blacklist!)
4866no-more-funn.moensted.dk (union of all results)
4706dnsbl.inps.de
4655ix.dnsbl.manitu.net
4210wl.mailspike.net (union of all results) (not a blacklist!)
2723wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2706bl.mailspike.net (result 127.0.0.12 = bad reputation)
2642ips.backscatterer.org
2562hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2474hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2427no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2206no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1874korea.services.net
1649hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1522blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1481wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1370dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1279mail-abuse.blacklist.jippg.org
1223bl.spamcannibal.org
1175spamsources.fabel.dk
600accredit.habeas.com (not a blacklist!)
550query.bondedsender.org (not a blacklist!)
539zen.spamhaus.org (union of SBL and SBLCSS results)
414dnsbl.njabl.org (union of all results)
413zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
347dnsbl.ahbl.org (union of all results)
343dnsbl.njabl.org (result 127.0.0.9 = open proxy)
290aspews.ext.sorbs.net
281tr.countries.nerd.dk
226dnsbl.ahbl.org (result 127.0.0.4 = spam source)
207bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
192iadb.isipp.com (not a blacklist!)
167l2.bbfh.ext.sorbs.net
146hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
132no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
126zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
116iadb2.isipp.com (not a blacklist!)
103dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
103dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
103dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
102no-more-funn.moensted.dk (result 127.0.0.9 = misc)
86dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
42tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
42tor.dnsbl.sectoor.de (union of all results)
40l1.bbfh.ext.sorbs.net
37dnsbl.njabl.org (result 127.0.0.4 = spam source)
35dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
34dnsbl.njabl.org (result 127.0.0.2 = open relay)
17hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
16bl.deadbeef.com
16swl.spamhaus.org (union of all results) (not a blacklist!)
15blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11multi.surbl.org
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5dnsbl-0.uceprotect.net
4swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2multi.uribl.com (union of all results)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1spamguard.leadmon.net (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
59513(total number of IP addresses whose names were tested, including 218 at SDSC)
29946hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23711hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20706(union of most domain zones)
16624abuse.rfc-ignorant.org
13568l1.apews.org
8827whois.rfc-ignorant.org (union of all results)
7678whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4140hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2867hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1150whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
342hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
277dbl.spamhaus.org (result 127.0.1.2 = spam source)
277dbl.spamhaus.org (union of all results)
240hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
235hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
221urired.spameatingmonkey.net
154hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
128hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
39postmaster.rfc-ignorant.org
37bogusmx.rfc-ignorant.org
36rhsbl.ahbl.org
25fresh.spameatingmonkey.net
16multi.surbl.org
15dob.sibl.support-intelligence.net
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
3dsn.rfc-ignorant.org (zone not intended for this use)
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
37248(total number of domains tested, including 201 at SDSC)
27470hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6330(union of most domain zones)
4157hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2577whois.rfc-ignorant.org (union of all results)
2435whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2427hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2356hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2306hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1507abuse.rfc-ignorant.org
862urired.spameatingmonkey.net
818postmaster.rfc-ignorant.org
703dbl.spamhaus.org (union of all results)
702dbl.spamhaus.org (result 127.0.1.2 = spam source)
693hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
646bogusmx.rfc-ignorant.org
634l1.apews.org
512multi.surbl.org
473multi.uribl.com (union of all results)
460multi.uribl.com (result 127.0.0.2 = spam resource)
335hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
263dsn.rfc-ignorant.org
195hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
142whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
102fresh.spameatingmonkey.net
50dob.sibl.support-intelligence.net
24rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12multi.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)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 October 2011.