Blacklists Compared

3 March 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
59884(total number of IP addresses tested, including 165 at SDSC)
57189(union of most IP zones)
47593b.barracudacentral.org
47064l2.apews.org
46369zen.spamhaus.org (union of all results)
44204zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
42630cbl.abuseat.org
42555ip.v4bl.org
36709bl.tiopan.com
30306zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
30239hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28886dnsbl-1.uceprotect.net
27960all.spamrats.com (union of all results)
26036hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25379dnsbl-3.uceprotect.net
24799dnsbl-2.uceprotect.net
24180spam.dnsbl.sorbs.net
21302bl.mailspike.net (union of all results)
20819dnsbl.sorbs.net (union of all results)
18918bl.spameatingmonkey.net
16570ubl.unsubscore.com
16214truncate.gbudb.net
15764blackholes.five-ten-sg.com (union of all results)
15757all.spamrats.com (result 127.0.0.36 = dialup)
12766psbl.surriel.com
12493dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12321all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9667dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9302bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8754bl.spamcop.net
8204bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7815bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
7325blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7049dnsbl.inps.de
7024blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6308list.dnswl.org (not a blacklist!)
6263zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5931db.wpbl.info
4052bl.score.senderscore.com
3770wl.mailspike.net (union of all results) (not a blacklist!)
3625ips.backscatterer.org
3502hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3225ix.dnsbl.manitu.net
2768hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2623hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2423wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2048no-more-funn.moensted.dk (union of all results)
1669hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1638korea.services.net
1447bl.spamcannibal.org
1405blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1342wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1279no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1220spamsources.fabel.dk
878mail-abuse.blacklist.jippg.org
749no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
672zen.spamhaus.org (union of SBL and SBLCSS results)
618accredit.habeas.com (not a blacklist!)
554query.bondedsender.org (not a blacklist!)
543zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
422dnsbl.njabl.org (union of all results)
420tr.countries.nerd.dk
364dnsbl.njabl.org (result 127.0.0.9 = open proxy)
348aspews.ext.sorbs.net
330l2.bbfh.ext.sorbs.net
322l1.bbfh.ext.sorbs.net
289dnsbl.sorbs.net (result 127.0.0.6 = spam source)
217dnsbl.ahbl.org (union of all results)
214iadb.isipp.com (not a blacklist!)
174hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
144dnsbl.ahbl.org (result 127.0.0.4 = spam source)
129zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
110iadb2.isipp.com (not a blacklist!)
82dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
82dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
82dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
57dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
35tor.dnsbl.sectoor.de (union of all results)
34hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
33dnsbl.njabl.org (result 127.0.0.2 = open relay)
32tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
25dnsbl.njabl.org (result 127.0.0.4 = spam source)
17swl.spamhaus.org (union of all results) (not a blacklist!)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
14no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9multi.surbl.org
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
6no-more-funn.moensted.dk (result 127.0.0.9 = misc)
5dnsbl-0.uceprotect.net
5wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5bl.deadbeef.com
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4spamguard.leadmon.net (union of all results)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1multi.uribl.com (result 127.0.0.2 = spam resource)
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
59884(total number of IP addresses whose names were tested, including 165 at SDSC)
31099hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24831hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20342(union of most domain zones)
16515abuse.rfc-ignorant.org
13756l1.apews.org
7868whois.rfc-ignorant.org (union of all results)
6719whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4045hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2873hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1151whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
484hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
404dbl.spamhaus.org (result 127.0.1.2 = spam source)
404dbl.spamhaus.org (union of all results)
365urired.spameatingmonkey.net
247hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
236hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
215hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
60hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40dob.sibl.support-intelligence.net
33postmaster.rfc-ignorant.org
29bogusmx.rfc-ignorant.org
28multi.surbl.org
22fresh.spameatingmonkey.net
16rhsbl.ahbl.org
10multi.uribl.com (result 127.0.0.2 = spam resource)
10multi.uribl.com (union of all results)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3dsn.rfc-ignorant.org (zone not intended for this use)
3bl.deadbeef.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
25230(total number of domains tested, including 136 at SDSC)
19976hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4649(union of most domain zones)
3897hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2145hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1898hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1466whois.rfc-ignorant.org (union of all results)
1399abuse.rfc-ignorant.org
1346whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
814hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
774dbl.spamhaus.org (union of all results)
773dbl.spamhaus.org (result 127.0.1.2 = spam source)
689postmaster.rfc-ignorant.org
655urired.spameatingmonkey.net
630hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
585multi.surbl.org
497l1.apews.org
436bogusmx.rfc-ignorant.org
397multi.uribl.com (union of all results)
386multi.uribl.com (result 127.0.0.2 = spam resource)
303hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
230dsn.rfc-ignorant.org
222dob.sibl.support-intelligence.net
120whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
44fresh.spameatingmonkey.net
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14rhsbl.ahbl.org
11hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8ex.dnsbl.org
3hostkarma.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)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 March 2012.