Blacklists Compared

11 May 2013

[ 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
52953(total number of IP addresses tested, including 157 at SDSC)
47629(union of most IP zones)
37305l2.apews.org
33197b.barracudacentral.org
32872zen.spamhaus.org (union of all results)
30129cbl.abuseat.org
30117zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29991bl.mailspike.net (union of all results)
27060bl.tiopan.com
26690bl.mailspike.net (result 127.0.0.12 = bad reputation)
25064zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24217hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22791spam.dnsbl.sorbs.net
18910dnsbl-2.uceprotect.net
18794dnsbl-1.uceprotect.net
15594ubl.unsubscore.com
15300hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13707dnsbl.inps.de
13578dnsbl-3.uceprotect.net
13414db.wpbl.info
13291truncate.gbudb.net
12909dnsbl.sorbs.net (union of all results)
12890all.spamrats.com (union of all results)
12013psbl.surriel.com
11380ips.backscatterer.org
9561bl.spameatingmonkey.net
7989wl.mailspike.net (union of all results) (not a blacklist!)
7387list.dnswl.org (not a blacklist!)
6919dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6810all.spamrats.com (result 127.0.0.36 = dialup)
5712all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5307wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4700dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4190dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4119bl.spamcop.net
3976hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3687hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3592bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3146bl.score.senderscore.com
3096hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2330wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2292ix.dnsbl.manitu.net
2264zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2171bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2048all.s5h.net
1706bl.spamcannibal.org
1696hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
967bl.mav.com.br
929spamsources.fabel.dk
859zen.spamhaus.org (union of SBL and SBLCSS results)
817bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
817accredit.habeas.com (not a blacklist!)
707free.v4bl.org
678query.bondedsender.org (not a blacklist!)
631mail-abuse.blacklist.jippg.org
548tr.countries.nerd.dk
500korea.services.net
452zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
419all.spamrats.com (result 127.0.0.38 = spam source)
407zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
282l2.bbfh.ext.sorbs.net
260wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
223iadb.isipp.com (not a blacklist!)
135hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
129dnsbl.ahbl.org (union of all results)
100iadb2.isipp.com (not a blacklist!)
95dnsbl.ahbl.org (result 127.0.0.4 = spam source)
93wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
39tor.dnsbl.sectoor.de (union of all results)
38tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
35dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
35dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
19dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
12dnsbl-0.uceprotect.net
11dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
8multi.surbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4spamguard.leadmon.net (union of all results)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
52953(total number of IP addresses whose names were tested, including 157 at SDSC)
27975hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17887hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7549l1.apews.org
3397hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3042hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2474(union of most domain zones)
1088hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
824hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
680dbl.spamhaus.org (result 127.0.1.2 = spam source)
680dbl.spamhaus.org (union of all results)
240hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
160hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
102hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
70multi.uribl.com (result 127.0.0.2 = spam resource)
70multi.uribl.com (union of all results)
65multi.surbl.org
33dob.sibl.support-intelligence.net
27fresh.spameatingmonkey.net
24urired.spameatingmonkey.net
19rhsbl.ahbl.org
12hostkarma.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
32694(total number of domains tested, including 131 at SDSC)
23324hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3986hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3347(union of most domain zones)
2298hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2014hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1993hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1907dbl.spamhaus.org (union of all results)
1902dbl.spamhaus.org (result 127.0.1.2 = spam source)
1516hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1314multi.uribl.com (union of all results)
1302multi.surbl.org
1300multi.uribl.com (result 127.0.0.2 = spam resource)
660l1.apews.org
437dob.sibl.support-intelligence.net
290hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
138fresh.spameatingmonkey.net
68urired.spameatingmonkey.net
27hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
4ex.dnsbl.org
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)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 May 2013.