Blacklists Compared

18 February 2012

[ 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
44019(total number of IP addresses tested, including 159 at SDSC)
41162(union of most IP zones)
31874b.barracudacentral.org
31731l2.apews.org
30073zen.spamhaus.org (union of all results)
29513ip.v4bl.org
28426zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28423cbl.abuseat.org
23035bl.tiopan.com
20731hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
20182spam.dnsbl.sorbs.net
18947zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
17609dnsbl-1.uceprotect.net
17560all.spamrats.com (union of all results)
17481hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16729bl.mailspike.net (union of all results)
14230dnsbl.sorbs.net (union of all results)
13351dnsbl-3.uceprotect.net
12885dnsbl-2.uceprotect.net
12614blackholes.five-ten-sg.com (union of all results)
11384bl.spameatingmonkey.net
11117ubl.unsubscore.com
10384all.spamrats.com (result 127.0.0.36 = dialup)
10383bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
10292psbl.surriel.com
9995truncate.gbudb.net
8283dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7247all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6720dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6165bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6123list.dnswl.org (not a blacklist!)
5974blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5151blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5121bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5091dnsbl.inps.de
5020bl.spamcop.net
4575db.wpbl.info
3842wl.mailspike.net (union of all results) (not a blacklist!)
3808hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3784zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3716no-more-funn.moensted.dk (union of all results)
3259ips.backscatterer.org
2851hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2471hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2457wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2349ix.dnsbl.manitu.net
2280bl.score.senderscore.com
2271no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1731hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1480blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1418no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1378wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1227korea.services.net
1196bl.spamcannibal.org
908spamsources.fabel.dk
668accredit.habeas.com (not a blacklist!)
590query.bondedsender.org (not a blacklist!)
584mail-abuse.blacklist.jippg.org
531zen.spamhaus.org (union of SBL and SBLCSS results)
371zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
360l1.bbfh.ext.sorbs.net
359l2.bbfh.ext.sorbs.net
322dnsbl.sorbs.net (result 127.0.0.6 = spam source)
298aspews.ext.sorbs.net
296dnsbl.njabl.org (union of all results)
282tr.countries.nerd.dk
228dnsbl.njabl.org (result 127.0.0.9 = open proxy)
204iadb.isipp.com (not a blacklist!)
189dnsbl.ahbl.org (union of all results)
166hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
160zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
124dnsbl.ahbl.org (result 127.0.0.4 = spam source)
110iadb2.isipp.com (not a blacklist!)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
50dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
45dnsbl.njabl.org (result 127.0.0.2 = open relay)
41tor.dnsbl.sectoor.de (union of all results)
40no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
23dnsbl.njabl.org (result 127.0.0.4 = spam source)
17hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
14swl.spamhaus.org (union of all results) (not a blacklist!)
9blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
6multi.surbl.org
6no-more-funn.moensted.dk (result 127.0.0.9 = misc)
6bl.deadbeef.com
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
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
44019(total number of IP addresses whose names were tested, including 159 at SDSC)
25614hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21090hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15588(union of most domain zones)
12276abuse.rfc-ignorant.org
10120l1.apews.org
6189whois.rfc-ignorant.org (union of all results)
5271whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3364hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2820hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
919whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
293hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
280hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
262hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
240dbl.spamhaus.org (result 127.0.1.2 = spam source)
240dbl.spamhaus.org (union of all results)
233urired.spameatingmonkey.net
198hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
89hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
82dob.sibl.support-intelligence.net
34postmaster.rfc-ignorant.org
29rhsbl.ahbl.org
26fresh.spameatingmonkey.net
25bogusmx.rfc-ignorant.org
17multi.surbl.org
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
3dsn.rfc-ignorant.org (zone not intended for this use)
3hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
28610(total number of domains tested, including 89 at SDSC)
22102hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4824(union of most domain zones)
3786hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2185hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1978hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1744whois.rfc-ignorant.org (union of all results)
1615whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1372abuse.rfc-ignorant.org
729postmaster.rfc-ignorant.org
678dbl.spamhaus.org (result 127.0.1.2 = spam source)
678dbl.spamhaus.org (union of all results)
565hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
556bogusmx.rfc-ignorant.org
550l1.apews.org
517urired.spameatingmonkey.net
507hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
375multi.uribl.com (union of all results)
362multi.uribl.com (result 127.0.0.2 = spam resource)
332multi.surbl.org
292hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
270dsn.rfc-ignorant.org
129whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
92fresh.spameatingmonkey.net
32hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
23rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12dob.sibl.support-intelligence.net
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 February 2012.