Blacklists Compared

4 February 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
44197(total number of IP addresses tested, including 160 at SDSC)
41341(union of most IP zones)
32923b.barracudacentral.org
32781l2.apews.org
31540zen.spamhaus.org (union of all results)
30114zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30112cbl.abuseat.org
25045ip.v4bl.org
23861bl.tiopan.com
22290spam.dnsbl.sorbs.net
22009hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
20631zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19374all.spamrats.com (union of all results)
19271dnsbl-1.uceprotect.net
16544dnsbl-3.uceprotect.net
16470dnsbl.sorbs.net (union of all results)
16035dnsbl-2.uceprotect.net
15083hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14716bl.mailspike.net (union of all results)
12830psbl.surriel.com
12753bl.spameatingmonkey.net
12206blackholes.five-ten-sg.com (union of all results)
12181ubl.unsubscore.com
10794all.spamrats.com (result 127.0.0.36 = dialup)
9766truncate.gbudb.net
8928dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8636all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7196bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6652dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5842list.dnswl.org (not a blacklist!)
5562bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5419blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5312blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
4990bl.spamcop.net
4622db.wpbl.info
4520dnsbl.inps.de
4379bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4124dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3809zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3726wl.mailspike.net (union of all results) (not a blacklist!)
3442no-more-funn.moensted.dk (union of all results)
3125hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2941bl.score.senderscore.com
2637hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2504ips.backscatterer.org
2415wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2267hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2194ix.dnsbl.manitu.net
1895no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1748hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1515no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1469blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1370korea.services.net
1305wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1154bl.spamcannibal.org
816spamsources.fabel.dk
658accredit.habeas.com (not a blacklist!)
593query.bondedsender.org (not a blacklist!)
508zen.spamhaus.org (union of SBL and SBLCSS results)
470mail-abuse.blacklist.jippg.org
360l2.bbfh.ext.sorbs.net
341zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
341l1.bbfh.ext.sorbs.net
294dnsbl.njabl.org (union of all results)
281aspews.ext.sorbs.net
234dnsbl.njabl.org (result 127.0.0.9 = open proxy)
225iadb.isipp.com (not a blacklist!)
218tr.countries.nerd.dk
189dnsbl.ahbl.org (union of all results)
169hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
167zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
111iadb2.isipp.com (not a blacklist!)
111dnsbl.ahbl.org (result 127.0.0.4 = spam source)
65dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
47dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
40dnsbl.njabl.org (result 127.0.0.2 = open relay)
36no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
23tor.dnsbl.sectoor.de (union of all results)
22tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
20dnsbl.njabl.org (result 127.0.0.4 = spam source)
19hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16no-more-funn.moensted.dk (result 127.0.0.9 = misc)
16swl.spamhaus.org (union of all results) (not a blacklist!)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
10bl.deadbeef.com
9spamguard.leadmon.net (union of all results)
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
8spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7multi.surbl.org
6dnsbl-0.uceprotect.net
6swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
2swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
44197(total number of IP addresses whose names were tested, including 160 at SDSC)
24223hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19880hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14868(union of most domain zones)
11893abuse.rfc-ignorant.org
10112l1.apews.org
5662whois.rfc-ignorant.org (union of all results)
4774whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3339hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2599hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
891whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
285dbl.spamhaus.org (result 127.0.1.2 = spam source)
285dbl.spamhaus.org (union of all results)
278hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
268urired.spameatingmonkey.net
264hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
244hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
185hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
86hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36dob.sibl.support-intelligence.net
30fresh.spameatingmonkey.net
28postmaster.rfc-ignorant.org
23bogusmx.rfc-ignorant.org
18rhsbl.ahbl.org
15multi.surbl.org
14multi.uribl.com (union of all results)
13multi.uribl.com (result 127.0.0.2 = spam resource)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4dsn.rfc-ignorant.org (zone not intended for this use)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.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
18124(total number of domains tested, including 128 at SDSC)
15968hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4042(union of most domain zones)
3621hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2084hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1969hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1260abuse.rfc-ignorant.org
1215whois.rfc-ignorant.org (union of all results)
1098whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
668postmaster.rfc-ignorant.org
635dbl.spamhaus.org (union of all results)
634dbl.spamhaus.org (result 127.0.1.2 = spam source)
569hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
526hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
502l1.apews.org
491urired.spameatingmonkey.net
402multi.uribl.com (union of all results)
392multi.uribl.com (result 127.0.0.2 = spam resource)
376multi.surbl.org
341bogusmx.rfc-ignorant.org
296hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
228dsn.rfc-ignorant.org
117whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
96dob.sibl.support-intelligence.net
91fresh.spameatingmonkey.net
17rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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 February 2012.