Blacklists Compared

11 July 2009

[ 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, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
167360(total number of IP addresses tested, including 187 at SDSC)
163791(union of most IP zones)
151154zen.spamhaus.org (union of all results)
145209l2.apews.org
122655cbl.abuseat.org
122551zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
114771hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
114083b.barracudacentral.org
108179dnsbl.sorbs.net (union of all results)
104003dnsbl-2.uceprotect.net
102037dnsbl-1.uceprotect.net
100571dnsbl-3.uceprotect.net
91895zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
82100dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
67238psbl.surriel.com
57115ubl.unsubscore.com
56657hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
43847no-more-funn.moensted.dk (union of all results)
42574blackholes.five-ten-sg.com (union of all results)
41710dnsbl.sorbs.net (result 127.0.0.10 = dialup)
39160bl.spamcop.net
38747blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
32923bl.spameatingmonkey.net
28932no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
28257zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
27606db.wpbl.info
22923ix.dnsbl.manitu.net
16397mail-abuse.blacklist.jippg.org
15474spam.dnsbl.sorbs.net
12973no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
11086korea.services.net
10685dnsbl.inps.de
8516hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8190bl.spamcannibal.org
7838tr.countries.nerd.dk
5333ips.backscatterer.org
5019spamsources.fabel.dk
3622list.dnswl.org (not a blacklist!)
3114hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2779blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2552dnsbl.njabl.org (union of all results)
2231dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1862hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1201no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1156hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1031blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
956hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
824aspews.ext.sorbs.net
662no-more-funn.moensted.dk (result 127.0.0.9 = misc)
394l2.bbfh.ext.sorbs.net
377query.bondedsender.org (not a blacklist!)
359dnsbl.sorbs.net (result 127.0.0.6 = spam source)
306l1.bbfh.ext.sorbs.net
210accredit.habeas.com (not a blacklist!)
208zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
189dnsbl.njabl.org (result 127.0.0.4 = spam source)
175dnsbl.ahbl.org (union of all results)
160iadb2.isipp.com (not a blacklist!)
143dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
132dnsbl.njabl.org (result 127.0.0.2 = open relay)
118iadb.isipp.com (not a blacklist!)
116no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
106tor.dnsbl.sectoor.de (union of all results)
105tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
76bl.deadbeef.com
60dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
55dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
33zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
32dnsbl.ahbl.org (result 127.0.0.4 = spam source)
18spamguard.leadmon.net (union of all results)
16spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
16blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9dnsbl-0.uceprotect.net
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
6multi.surbl.org
6blackholes.brainerd.net
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)

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
167360(total number of IP addresses whose names were tested, including 187 at SDSC)
99418hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
90480hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
81750(union of most domain zones)
74004l1.apews.org
64448abuse.rfc-ignorant.org
32220dynamic.rhs.mailpolice.com
28168whois.rfc-ignorant.org (union of all results)
16544whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11624whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
9086hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4124webmail.rhs.mailpolice.com
3462hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1441urired.spameatingmonkey.net
927hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
773adv.rhs.mailpolice.com
712rhsbl.ahbl.org
288hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
271hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
184hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
86rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
86rhsbl.sorbs.net (union of all results)
69postmaster.rfc-ignorant.org
53bogusmx.rfc-ignorant.org
46dsn.rfc-ignorant.org (zone not intended for this use)
40multi.uribl.com (result 127.0.0.2 = spam resource)
40multi.uribl.com (union of all results)
29multi.surbl.org
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18fresh.spameatingmonkey.net
18dob.sibl.support-intelligence.net
17bulk.rhs.mailpolice.com
15bl.deadbeef.com
4porn.rhs.mailpolice.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
57763(total number of domains tested, including 158 at SDSC)
43854hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14881(union of most domain zones)
7358hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6390whois.rfc-ignorant.org (union of all results)
6021hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
5769whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4914hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4074abuse.rfc-ignorant.org
2562hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2268l1.apews.org
1900hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1507bogusmx.rfc-ignorant.org
1419postmaster.rfc-ignorant.org
1409urired.spameatingmonkey.net
1149multi.surbl.org
1093multi.uribl.com (union of all results)
1080multi.uribl.com (result 127.0.0.2 = spam resource)
1048webmail.rhs.mailpolice.com
719hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
621whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
438dsn.rfc-ignorant.org
330adv.rhs.mailpolice.com
191dynamic.rhs.mailpolice.com
186hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
174porn.rhs.mailpolice.com
97rhsbl.ahbl.org
88bulk.rhs.mailpolice.com
68hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
31fresh.spameatingmonkey.net
18dob.sibl.support-intelligence.net
15ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3fraud.rhs.mailpolice.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 July 2009.