Blacklist Check

Check to see if your IP addresses are listed with nearly 70 DNS based anti-spam databases! Will your mail server be blocked by DNSbl filters?

Probably the most common way of detecting spam is rejecting mail that comes from mail servers known (or believed) to send spam. This is done by taking the IP address of the remote mail server, converting it to a domain name using the ip4r format (a.b.c.d becomes d.c.b.a.lookupzone.com), and doing a lookup to check if that IP address is listed in one of the databases.

Just because the IP is listed with a particular blacklist does not mean that you are sending spam, just that particular blacklist suggests not to accept mail directly from that IP address. Most residential Cable/DSL IP addresses that aredynamically assigned will indicate that they are blacklisted, meaning you should be sending from your ISP's mail server, not a mail server running on your own internet connection.

If you have questions or would like to discuss DNS based blacklists please visit the DNS based Blacklists Forum.

FAQ: What is a DNSBL?

Blacklist Check List

access.redhawk.org	b.barracudacentral.org	bl.csma.biz
bl.emailbasura.org	bl.spamcannibal.org	bl.spamcop.net
bl.technovision.dk	blackholes.five-ten-sg.com	blackholes.wirehub.net
blacklist.sci.kun.nl	block.dnsbl.sorbs.net	blocked.hilli.dk
cart00ney.surriel.com	cbl.abuseat.org	dev.null.dk
dialup.blacklist.jippg.org	dialups.mail-abuse.org	dialups.visi.com
dnsbl.ahbl.org	dnsbl.antispam.or.id	dnsbl.cyberlogic.net
dnsbl.kempt.net	dnsbl.njabl.org	dnsbl.sorbs.net
dnsbl-1.uceprotect.net	dnsbl-2.uceprotect.net	dnsbl-3.uceprotect.net
duinv.aupads.org	dul.dnsbl.sorbs.net	dul.ru
escalations.dnsbl.sorbs.net	fl.chickenboner.biz	hil.habeas.com
http.dnsbl.sorbs.net	intruders.docs.uu.se	korea.services.net
mail-abuse.blacklist.jippg.org	misc.dnsbl.sorbs.net	msgid.bl.gweep.ca
new.dnsbl.sorbs.net	no-more-funn.moensted.dk	old.dnsbl.sorbs.net
pbl.spamhaus.org	proxy.bl.gweep.ca	psbl.surriel.com
pss.spambusters.org.ar	rbl.schulte.org	rbl.snark.net
recent.dnsbl.sorbs.net	relays.bl.gweep.ca	relays.bl.kundenserver.de
relays.mail-abuse.org	relays.nether.net	rsbl.aupads.org
sbl.spamhaus.org	smtp.dnsbl.sorbs.net	socks.dnsbl.sorbs.net
spam.dnsbl.sorbs.net	spam.olsentech.net	spamguard.leadmon.net
spamsources.fabel.dk	tor.ahbl.org	web.dnsbl.sorbs.net
whois.rfc-ignorant.org	xbl.spamhaus.org	zen.spamhaus.org
zombie.dnsbl.sorbs.net	bl.tiopan.com

WhatIsMyIPAddress.com does not run, manage, or have any direct relationship with any blacklist. We provide a single location to check the status of an IP address on 3rd party blacklists. WhatIsMyIPAddress.com does not recommend the usage of any specific blacklist and does not condone blacklists that require payment for removal. Our inclusion of such blacklists are for the purposes of completeness and should not be consider to be in support of that blacklist's usage.

Legend

 = Not Listed
 = Listed
 = Timeout Error
 = Offline

Related Articles

• What is a mail server?
• What is a DNSBL?