Blacklists Compared

13 August 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
47911(total number of IP addresses tested, including 186 at SDSC)
44609(union of most IP zones)
36470b.barracudacentral.org
36282l2.apews.org
34380zen.spamhaus.org (union of all results)
32660cbl.abuseat.org
32659zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30065hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28915bl.mailspike.net (union of all results)
24908dnsbl-1.uceprotect.net
23391dnsbl-3.uceprotect.net
23127dnsbl-2.uceprotect.net
22254zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22013hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19718truncate.gbudb.net
19091ddnsbl.internetdefensesystems.com
18492bl.tiopan.com
18353spam.dnsbl.sorbs.net
17293bl.spameatingmonkey.net
16201blackholes.five-ten-sg.com (union of all results)
14684ubl.unsubscore.com
13924bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13134bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12386bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12286dnsbl.sorbs.net (union of all results)
11890psbl.surriel.com
8141blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7753dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6468blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5579bl.spamcop.net
5522list.dnswl.org (not a blacklist!)
5364bl.score.senderscore.com
5233db.wpbl.info
5221zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5180dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4081no-more-funn.moensted.dk (union of all results)
3835wl.mailspike.net (union of all results) (not a blacklist!)
3079bl.mailspike.net (result 127.0.0.12 = bad reputation)
2975ix.dnsbl.manitu.net
2948dnsbl.inps.de
2935hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2691hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2486hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2442wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1979no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1963no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1892ips.backscatterer.org
1575blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1566hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1381wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1209bl.spamcannibal.org
1197korea.services.net
1067spamsources.fabel.dk
991mail-abuse.blacklist.jippg.org
618accredit.habeas.com (not a blacklist!)
571query.bondedsender.org (not a blacklist!)
380dnsbl.njabl.org (union of all results)
343tr.countries.nerd.dk
297dnsbl.njabl.org (result 127.0.0.9 = open proxy)
282aspews.ext.sorbs.net
232zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
232zen.spamhaus.org (union of SBL and SBLCSS results)
221dnsbl.ahbl.org (union of all results)
205iadb2.isipp.com (not a blacklist!)
182iadb.isipp.com (not a blacklist!)
144hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
130dnsbl.ahbl.org (result 127.0.0.4 = spam source)
122dnsbl.sorbs.net (result 127.0.0.6 = spam source)
78l2.bbfh.ext.sorbs.net
76dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
76dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
76dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
72no-more-funn.moensted.dk (result 127.0.0.9 = misc)
72dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
59no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
49dnsbl.njabl.org (result 127.0.0.2 = open relay)
36no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
32tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32tor.dnsbl.sectoor.de (union of all results)
25l1.bbfh.ext.sorbs.net
21swl.spamhaus.org (union of all results) (not a blacklist!)
19dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
17blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15bl.deadbeef.com
12wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9multi.surbl.org
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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.uribl.com (union of all results)
3spamguard.leadmon.net (union of all results)
2zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
47911(total number of IP addresses whose names were tested, including 186 at SDSC)
26680hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21506hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18261(union of most domain zones)
14788abuse.rfc-ignorant.org
11688l1.apews.org
7269whois.rfc-ignorant.org (union of all results)
6242whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3763hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2762hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1029whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
384hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
259hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
218hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
179hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
170dbl.spamhaus.org (result 127.0.1.2 = spam source)
170dbl.spamhaus.org (union of all results)
163urired.spameatingmonkey.net
97hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
48postmaster.rfc-ignorant.org
36bogusmx.rfc-ignorant.org
27multi.surbl.org
22hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19rhsbl.ahbl.org
16fresh.spameatingmonkey.net
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
6dob.sibl.support-intelligence.net
3dsn.rfc-ignorant.org (zone not intended for this use)
3bl.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
19946(total number of domains tested, including 157 at SDSC)
17314hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5495(union of most domain zones)
3860hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2845whois.rfc-ignorant.org (union of all results)
2723whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1997hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1864hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1303abuse.rfc-ignorant.org
688postmaster.rfc-ignorant.org
644l1.apews.org
543hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
527hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
469bogusmx.rfc-ignorant.org
426dbl.spamhaus.org (result 127.0.1.2 = spam source)
426dbl.spamhaus.org (union of all results)
368urired.spameatingmonkey.net
351multi.surbl.org
337multi.uribl.com (union of all results)
329multi.uribl.com (result 127.0.0.2 = spam resource)
323hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
251dsn.rfc-ignorant.org
122whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
72fresh.spameatingmonkey.net
42dob.sibl.support-intelligence.net
18hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
7ex.dnsbl.org
6multi.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)
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 15 August 2011.