Blacklists Compared

10 November 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
45267(total number of IP addresses tested, including 151 at SDSC)
40856(union of most IP zones)
32547l2.apews.org
31997zen.spamhaus.org (union of all results)
31955b.barracudacentral.org
30677cbl.abuseat.org
30665zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30447ip.v4bl.org
29174bl.tiopan.com
23701hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22279bl.mailspike.net (union of all results)
21353hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20012zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19582dnsbl-1.uceprotect.net
18406bl.mailspike.net (result 127.0.0.12 = bad reputation)
16236dnsbl-2.uceprotect.net
14911dnsbl-3.uceprotect.net
13822ubl.unsubscore.com
13400all.spamrats.com (union of all results)
12912psbl.surriel.com
12529dnsbl.sorbs.net (union of all results)
11256bl.spameatingmonkey.net
10534dnsbl.inps.de
10390wl.mailspike.net (union of all results) (not a blacklist!)
10016spam.dnsbl.sorbs.net
8981dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7351db.wpbl.info
6538wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
6508all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6462all.spamrats.com (result 127.0.0.36 = dialup)
6414list.dnswl.org (not a blacklist!)
5350bl.spamcop.net
4305dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4120truncate.gbudb.net
4042free.v4bl.org
3152bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3115ix.dnsbl.manitu.net
2995zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2966wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2898hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2854all.s5h.net
2774hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2518bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2502bl.score.senderscore.com
1764ips.backscatterer.org
1742mail-abuse.blacklist.jippg.org
1723hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1438zen.spamhaus.org (union of SBL and SBLCSS results)
1417hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1363bl.spamcannibal.org
982spamsources.fabel.dk
941zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
875korea.services.net
871accredit.habeas.com (not a blacklist!)
802tr.countries.nerd.dk
695query.bondedsender.org (not a blacklist!)
668wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
497zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
491all.spamrats.com (result 127.0.0.38 = spam source)
330l2.bbfh.ext.sorbs.net
306aspews.ext.sorbs.net
288iadb.isipp.com (not a blacklist!)
236dnsbl.ahbl.org (union of all results)
218wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
215dnsbl.njabl.org (union of all results)
200dnsbl.ahbl.org (result 127.0.0.4 = spam source)
168dnsbl.njabl.org (result 127.0.0.9 = open proxy)
154bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
135iadb2.isipp.com (not a blacklist!)
121hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
42dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
42dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
42dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
39tor.dnsbl.sectoor.de (union of all results)
37tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
24dnsbl.njabl.org (result 127.0.0.4 = spam source)
23dnsbl.njabl.org (result 127.0.0.2 = open relay)
23dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11multi.surbl.org
11dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3spamguard.leadmon.net (union of all results)
2wadb.isipp.com
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
45267(total number of IP addresses whose names were tested, including 151 at SDSC)
21294hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17100hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6896l1.apews.org
2758hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2743hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1598(union of most domain zones)
623hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
567dbl.spamhaus.org (result 127.0.1.2 = spam source)
567dbl.spamhaus.org (union of all results)
335hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
300hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
269urired.spameatingmonkey.net
232hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
153hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
135multi.surbl.org
131multi.uribl.com (result 127.0.0.2 = spam resource)
131multi.uribl.com (union of all results)
113fresh.spameatingmonkey.net
78dob.sibl.support-intelligence.net
45rhsbl.ahbl.org
31hostkarma.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
35471(total number of domains tested, including 100 at SDSC)
30431hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4570hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4042(union of most domain zones)
3037hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2526hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2481hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2221dbl.spamhaus.org (union of all results)
2217dbl.spamhaus.org (result 127.0.1.2 = spam source)
2190hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1549multi.surbl.org
1304multi.uribl.com (union of all results)
1286multi.uribl.com (result 127.0.0.2 = spam resource)
947urired.spameatingmonkey.net
781fresh.spameatingmonkey.net
700l1.apews.org
626dob.sibl.support-intelligence.net
328hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
49hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
22rhsbl.ahbl.org
17multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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 12 November 2012.