Blacklists Compared

14 January 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
52790(total number of IP addresses tested, including 166 at SDSC)
49922(union of most IP zones)
41788b.barracudacentral.org
41101l2.apews.org
40449zen.spamhaus.org (union of all results)
38883zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
38881cbl.abuseat.org
29490bl.tiopan.com
29276ip.v4bl.org
28634hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
27850spam.dnsbl.sorbs.net
26792zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25369dnsbl-1.uceprotect.net
23227dnsbl-3.uceprotect.net
22917dnsbl-2.uceprotect.net
22562bl.mailspike.net (union of all results)
21571dnsbl.sorbs.net (union of all results)
20566truncate.gbudb.net
17677bl.spameatingmonkey.net
16064ubl.unsubscore.com
15812psbl.surriel.com
14608hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14237blackholes.five-ten-sg.com (union of all results)
11630dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10813bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9543bl.mailspike.net (result 127.0.0.11 = very bad reputation)
9039dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8633ix.dnsbl.manitu.net
7850bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7346bl.spamcop.net
6834hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6428blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6412blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6328db.wpbl.info
5786list.dnswl.org (not a blacklist!)
5571zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5556dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4036bl.score.senderscore.com
3894no-more-funn.moensted.dk (union of all results)
3741wl.mailspike.net (union of all results) (not a blacklist!)
3283dnsbl.inps.de
2633ips.backscatterer.org
2460wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2431hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2365hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1946no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1871no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1689hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1552korea.services.net
1391blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1275wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1232bl.spamcannibal.org
987spamsources.fabel.dk
852mail-abuse.blacklist.jippg.org
606accredit.habeas.com (not a blacklist!)
558query.bondedsender.org (not a blacklist!)
377zen.spamhaus.org (union of SBL and SBLCSS results)
370l2.bbfh.ext.sorbs.net
351l1.bbfh.ext.sorbs.net
340dnsbl.njabl.org (union of all results)
290dnsbl.njabl.org (result 127.0.0.9 = open proxy)
279aspews.ext.sorbs.net
267zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
263dnsbl.ahbl.org (union of all results)
236tr.countries.nerd.dk
227iadb.isipp.com (not a blacklist!)
171dnsbl.ahbl.org (result 127.0.0.4 = spam source)
151hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
110zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
107iadb2.isipp.com (not a blacklist!)
82dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
70dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
70dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
70dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
60no-more-funn.moensted.dk (result 127.0.0.9 = misc)
38tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
38tor.dnsbl.sectoor.de (union of all results)
37hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
30no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
29dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
26dnsbl.njabl.org (result 127.0.0.4 = spam source)
24dnsbl.njabl.org (result 127.0.0.2 = open relay)
14swl.spamhaus.org (union of all results) (not a blacklist!)
10no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
10dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
8bl.deadbeef.com
7dnsbl-0.uceprotect.net
7multi.surbl.org
6swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
6blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6spamguard.leadmon.net (union of all results)
5swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.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
52790(total number of IP addresses whose names were tested, including 166 at SDSC)
27168hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21189hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17975(union of most domain zones)
14587abuse.rfc-ignorant.org
12087l1.apews.org
7032whois.rfc-ignorant.org (union of all results)
6032whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3917hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2544hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1000whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
355hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
311hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
250dbl.spamhaus.org (result 127.0.1.2 = spam source)
250dbl.spamhaus.org (union of all results)
200hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
181urired.spameatingmonkey.net
173hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
136hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
44fresh.spameatingmonkey.net
34dob.sibl.support-intelligence.net
26postmaster.rfc-ignorant.org
23multi.surbl.org
23bogusmx.rfc-ignorant.org
16rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1dsn.rfc-ignorant.org (zone not intended for this use)
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
18004(total number of domains tested, including 133 at SDSC)
15544hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4730(union of most domain zones)
3558hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1979hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1970whois.rfc-ignorant.org (union of all results)
1859whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1836hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1224abuse.rfc-ignorant.org
681dbl.spamhaus.org (result 127.0.1.2 = spam source)
681dbl.spamhaus.org (union of all results)
641hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
635postmaster.rfc-ignorant.org
530multi.uribl.com (union of all results)
518multi.uribl.com (result 127.0.0.2 = spam resource)
511l1.apews.org
444urired.spameatingmonkey.net
439multi.surbl.org
425hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
323bogusmx.rfc-ignorant.org
280hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
246fresh.spameatingmonkey.net
207dsn.rfc-ignorant.org
140dob.sibl.support-intelligence.net
111whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3hostkarma.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 16 January 2012.