Blacklists Compared

31 December 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
44108(total number of IP addresses tested, including 285 at SDSC)
42016(union of most IP zones)
35167b.barracudacentral.org
35059l2.apews.org
34217zen.spamhaus.org (union of all results)
32817zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
32817cbl.abuseat.org
25819hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
25125spam.dnsbl.sorbs.net
25082ip.v4bl.org
23878bl.tiopan.com
22975zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
20843dnsbl-1.uceprotect.net
19585bl.mailspike.net (union of all results)
19438dnsbl-2.uceprotect.net
19348dnsbl-3.uceprotect.net
19176dnsbl.sorbs.net (union of all results)
17912truncate.gbudb.net
14689bl.spameatingmonkey.net
12617blackholes.five-ten-sg.com (union of all results)
11997ix.dnsbl.manitu.net
11861psbl.surriel.com
11746hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
10680dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8813bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
8538bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7641ubl.unsubscore.com
7340dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7247bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6457hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6137blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5708dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5519bl.spamcop.net
5328blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4725zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4578db.wpbl.info
4516list.dnswl.org (not a blacklist!)
3713no-more-funn.moensted.dk (union of all results)
3292bl.score.senderscore.com
2896dnsbl.inps.de
2815wl.mailspike.net (union of all results) (not a blacklist!)
2200ips.backscatterer.org
2080no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2000hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1935hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1876wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1523no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1286korea.services.net
1181hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1142blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1109bl.spamcannibal.org
977spamsources.fabel.dk
937wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
578accredit.habeas.com (not a blacklist!)
573mail-abuse.blacklist.jippg.org
553query.bondedsender.org (not a blacklist!)
372zen.spamhaus.org (union of SBL and SBLCSS results)
329l2.bbfh.ext.sorbs.net
329dnsbl.njabl.org (union of all results)
315l1.bbfh.ext.sorbs.net
287dnsbl.ahbl.org (union of all results)
282zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
278dnsbl.njabl.org (result 127.0.0.9 = open proxy)
225tr.countries.nerd.dk
220aspews.ext.sorbs.net
193dnsbl.ahbl.org (result 127.0.0.4 = spam source)
181iadb.isipp.com (not a blacklist!)
136hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
99iadb2.isipp.com (not a blacklist!)
90zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
82no-more-funn.moensted.dk (result 127.0.0.9 = misc)
72dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
63dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
30dnsbl.njabl.org (result 127.0.0.2 = open relay)
30no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
22dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21dnsbl.njabl.org (result 127.0.0.4 = spam source)
19no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
15dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
13tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
13tor.dnsbl.sectoor.de (union of all results)
12swl.spamhaus.org (union of all results) (not a blacklist!)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
7swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
7bl.deadbeef.com
4swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.surbl.org
3multi.uribl.com (union of all results)
2wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
1dnsbl-0.uceprotect.net
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
44108(total number of IP addresses whose names were tested, including 285 at SDSC)
21454hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16818hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14406(union of most domain zones)
11812abuse.rfc-ignorant.org
9545l1.apews.org
5547whois.rfc-ignorant.org (union of all results)
4697whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3245hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1930hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
850whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
286hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
257dbl.spamhaus.org (result 127.0.1.2 = spam source)
257dbl.spamhaus.org (union of all results)
203hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
180hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
167hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
140hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
110urired.spameatingmonkey.net
30bogusmx.rfc-ignorant.org
24fresh.spameatingmonkey.net
23postmaster.rfc-ignorant.org
12dob.sibl.support-intelligence.net
12rhsbl.ahbl.org
10multi.uribl.com (result 127.0.0.2 = spam resource)
10multi.surbl.org
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10multi.uribl.com (union of all results)
2dsn.rfc-ignorant.org (zone not intended for this use)
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
14387(total number of domains tested, including 299 at SDSC)
11450hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4129(union of most domain zones)
2651hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1663hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1637whois.rfc-ignorant.org (union of all results)
1522whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1478hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1278hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1191abuse.rfc-ignorant.org
687postmaster.rfc-ignorant.org
656dbl.spamhaus.org (result 127.0.1.2 = spam source)
656dbl.spamhaus.org (union of all results)
545hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
438l1.apews.org
423multi.uribl.com (union of all results)
416multi.uribl.com (result 127.0.0.2 = spam resource)
399multi.surbl.org
348urired.spameatingmonkey.net
309bogusmx.rfc-ignorant.org
292hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
220dsn.rfc-ignorant.org
115whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
81dob.sibl.support-intelligence.net
60fresh.spameatingmonkey.net
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12rhsbl.ahbl.org
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
5multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 January 2012.