Blacklists Compared

19 November 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
53071(total number of IP addresses tested, including 184 at SDSC)
49737(union of most IP zones)
40358l2.apews.org
39293zen.spamhaus.org (union of all results)
37714b.barracudacentral.org
37507cbl.abuseat.org
37504zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
31548ip.v4bl.org
28154hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
25574dnsbl-1.uceprotect.net
25195bl.mailspike.net (union of all results)
24981zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24732dnsbl-2.uceprotect.net
24464dnsbl-3.uceprotect.net
24087dnsbl.sorbs.net (union of all results)
23249spam.dnsbl.sorbs.net
20684bl.tiopan.com
19308truncate.gbudb.net
17550hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16997bl.spameatingmonkey.net
16768dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
15805blackholes.five-ten-sg.com (union of all results)
15259ix.dnsbl.manitu.net
14053ubl.unsubscore.com
13760psbl.surriel.com
12386bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11290bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9717bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9186dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7161blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6936blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6105list.dnswl.org (not a blacklist!)
5843hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5565db.wpbl.info
5491zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5158bl.spamcop.net
4609no-more-funn.moensted.dk (union of all results)
4097wl.mailspike.net (union of all results) (not a blacklist!)
4047dnsbl.inps.de
3816bl.score.senderscore.com
3390dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2684hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2661wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2611ips.backscatterer.org
2503hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2258no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1951no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1788hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1680blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1523korea.services.net
1428wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1206bl.spamcannibal.org
1063spamsources.fabel.dk
883mail-abuse.blacklist.jippg.org
638accredit.habeas.com (not a blacklist!)
605query.bondedsender.org (not a blacklist!)
455zen.spamhaus.org (union of SBL and SBLCSS results)
374dnsbl.njabl.org (union of all results)
347zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
292dnsbl.ahbl.org (union of all results)
290dnsbl.njabl.org (result 127.0.0.9 = open proxy)
281aspews.ext.sorbs.net
253tr.countries.nerd.dk
199iadb.isipp.com (not a blacklist!)
198no-more-funn.moensted.dk (result 127.0.0.9 = misc)
187dnsbl.ahbl.org (result 127.0.0.4 = spam source)
175hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
170l2.bbfh.ext.sorbs.net
133no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
116iadb2.isipp.com (not a blacklist!)
108zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
89no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
77dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
77dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
77dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
73spamguard.leadmon.net (union of all results)
72spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
68dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
50dnsbl.njabl.org (result 127.0.0.2 = open relay)
48l1.bbfh.ext.sorbs.net
45hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29tor.dnsbl.sectoor.de (union of all results)
28blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24swl.spamhaus.org (union of all results) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8dnsbl-0.uceprotect.net
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6bl.deadbeef.com
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.surbl.org
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
53071(total number of IP addresses whose names were tested, including 184 at SDSC)
28695hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
22823hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19286(union of most domain zones)
15182abuse.rfc-ignorant.org
12478l1.apews.org
7901whois.rfc-ignorant.org (union of all results)
6788whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4076hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2796hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1113whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
435hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
324dbl.spamhaus.org (result 127.0.1.2 = spam source)
324dbl.spamhaus.org (union of all results)
280hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
210hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
206urired.spameatingmonkey.net
204hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
124hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
66postmaster.rfc-ignorant.org
55rhsbl.ahbl.org
32multi.surbl.org
31multi.uribl.com (result 127.0.0.2 = spam resource)
31multi.uribl.com (union of all results)
26bogusmx.rfc-ignorant.org
15fresh.spameatingmonkey.net
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5dob.sibl.support-intelligence.net
4dsn.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
25005(total number of domains tested, including 139 at SDSC)
21584hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5583(union of most domain zones)
3837hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2258hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2155whois.rfc-ignorant.org (union of all results)
2084hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2034whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1422abuse.rfc-ignorant.org
889dbl.spamhaus.org (result 127.0.1.2 = spam source)
889dbl.spamhaus.org (union of all results)
786hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
743hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
725postmaster.rfc-ignorant.org
592multi.uribl.com (union of all results)
579l1.apews.org
577multi.uribl.com (result 127.0.0.2 = spam resource)
536multi.surbl.org
508urired.spameatingmonkey.net
483bogusmx.rfc-ignorant.org
326hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
240dsn.rfc-ignorant.org
164fresh.spameatingmonkey.net
121whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
58dob.sibl.support-intelligence.net
27hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 21 November 2011.