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Blocklist checker

Instantly check your domain or IP against hundreds of email blocklists and blacklists, including all major DNSBL, RBL, and RHSBL lists.
Blocklist checker
Check your domain or IP against 144 blocklists.
www.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networkswww.spamcop.net logoCisco
Blocklist icon
Mailspikewww.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECTuribl.com logoURIBL
Blocklist icon
8086 Consultancyabuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.ltdnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBLrbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filterwww.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Babywww.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawkrv-soft.info logoRV-SOFT Technology
Blocklist icon
Schultewww.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkeypsbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networkswww.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networkssenderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networkswww.spamcop.net logoCisco
Blocklist icon
Mailspikewww.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECTuribl.com logoURIBL
Blocklist icon
8086 Consultancyabuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.ltdnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBLrbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filterwww.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Babywww.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawkrv-soft.info logoRV-SOFT Technology
Blocklist icon
Schultewww.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkeypsbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networkswww.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networkssenderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networkswww.spamcop.net logoCisco
Blocklist icon
Mailspikewww.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECTuribl.com logoURIBL
Blocklist icon
8086 Consultancyabuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.ltdnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBLrbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filterwww.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Babywww.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawkrv-soft.info logoRV-SOFT Technology
Blocklist icon
Schultewww.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkeypsbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networkswww.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networkssenderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networkswww.spamcop.net logoCisco
Blocklist icon
Mailspikewww.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECTuribl.com logoURIBL
Blocklist icon
8086 Consultancyabuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.ltdnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBLrbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filterwww.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Babywww.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawkrv-soft.info logoRV-SOFT Technology
Blocklist icon
Schultewww.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkeypsbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networkswww.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networkssenderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheftwww.spamhaus.org logoSpamhaus0spam.org logo0Spam
Blocklist icon
Abusix
Blocklist icon
Barracuda Networkswww.spamcop.net logoCisco
Blocklist icon
Mailspikewww.nosolicitado.org logoNoSolicitado
Blocklist icon
SURBL
Blocklist icon
UCEPROTECTuribl.com logoURIBL
Blocklist icon
8086 Consultancyabuse.ro logoabuse.rowiki.alphanet.ch logoALPHANETanonmails.de logoAnonmailsascams.com logoAscamswww.blockedservers.com logoBLOCKEDSERVERS
Blocklist icon
Brukalai.ltdnsbl.calivent.com.pe logoCalivent Networks
Blocklist icon
dan.me.uk
Blocklist icon
DrMx
Blocklist icon
DroneBLrbl.efnetrbl.org logoEFnet
Blocklist icon
Fabel
Blocklist icon
GBUdb
Blocklist icon
ImproWare
Blocklist icon
JIPPG Technologies
Blocklist icon
Junk Email Filterwww.justspam.org logoJustSpamwww.kempt.net logoKempt.net
Blocklist icon
Mail Babywww.nordspam.com logoNordSpam
Blocklist icon
nsZones
Blocklist icon
Polspam
Blocklist icon
RedHawkrv-soft.info logoRV-SOFT Technology
Blocklist icon
Schultewww.scientificspam.net logoScientific Spam
Blocklist icon
Spam Eating Monkeypsbl.org logoSpamikazewww.spamrats.com logoSpamRATSspfbl.net logoSPFBLsuomispam.net logoSuomispamwww.usenix.org.uk logoSystem 5 Hosting
Blocklist icon
Taughannock Networkswww.team-cymru.com logoTeam Cymru
Blocklist icon
Tornevall Networkssenderscore.org logoValiditywww.blocklist.de logowww.blocklist.de Fail2Ban-Reporting Servicezapbl.net logoZapBL2stepback.dk logo2stepback.dkfaynticrbl.org logoFayntic Servicesorbz.gst-group.co.uk logoORB UKdnsbl.technoirc.org logotechnoirc.orgwww.techtheft.info logoTechTheft

We check 144 blocklists

Spamhaus Blocklist (SBL)
Organization
Spamhaus
Zone
sbl.dq.spamhaus.net
Type
IP
Impact
High
Delisting
Manual
Spamhaus Domain Blocklist (DBL)
Organization
Spamhaus
Zone
dbl.dq.spamhaus.net
Type
Domain
Impact
High
Delisting
Manual
Spamhaus Exploits Blocklist (XBL)
Organization
Spamhaus
Zone
xbl.dq.spamhaus.net
Type
IP
Impact
High
Delisting
Manual
Spamhaus Policy Blocklist (PBL)
Organization
Spamhaus
Zone
pbl.dq.spamhaus.net
Type
IP
Impact
High
Delisting
Manual
Spamhaus ZEN Blocklist
Organization
Spamhaus
Zone
zen.dq.spamhaus.net
Type
IP
Impact
High
Delisting
Manual
0Spam Block List (BL)
Organization
0Spam
Zone
bl.0spam.org
Type
IP
Impact
Medium
Delisting
Manual
0Spam Network Block List (NBL)
Organization
0Spam
Zone
nbl.0spam.org
Type
IP
Impact
Medium
Delisting
Manual
0Spam Realtime Block List (RBL)
Organization
0Spam
Zone
rbl.0spam.org
Type
IP
Impact
Medium
Delisting
Automatic
0Spam Uniform Resource Locator Block List (URLBL)
Organization
0Spam
Zone
dbl.0spam.org
Type
IP
Impact
Medium
Delisting
Manual
Abusix Authbl Blocklist
Organization
Abusix
Zone
authbl.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Manual
Abusix Combined Blocklist
Organization
Abusix
Zone
combined.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Manual
Abusix Domain Blocklist
Organization
Abusix
Zone
dblack.mail.abusix.zone
Type
Domain or IP
Impact
Medium
Delisting
Manual
Abusix Exploit Blocklist
Organization
Abusix
Zone
exploit.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Manual
Abusix nod List (Newly Observed Domains)
Organization
Abusix
Zone
nod.mail.abusix.zone
Type
Domain
Impact
Medium
Delisting
Automatic
Abusix noip List (Newly Observed IPs)
Organization
Abusix
Zone
noip.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Automatic
Abusix Policy Blocklist
Organization
Abusix
Zone
dynamic.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Manual
Abusix Spam Blocklist
Organization
Abusix
Zone
black.mail.abusix.zone
Type
IP
Impact
Medium
Delisting
Manual
Barracuda Networks Barracuda Reputation Block List (BRBL)
Organization
Barracuda Networks
Zone
b.barracudacentral.org
Type
IP
Impact
Medium
Delisting
Manual
Cisco SpamCop Blocking List (SCBL)
Organization
Cisco
Zone
bl.spamcop.net
Type
IP
Impact
Medium
Delisting
Automatic
Mailspike Blacklist (BL)
Organization
Mailspike
Zone
bl.mailspike.net
Type
IP
Impact
Medium
Delisting
Manual
Mailspike Reputation
Organization
Mailspike
Zone
rep.mailspike.net
Type
Score
Impact
Medium
Delisting
Manual
Mailspike Z - Zero-Hour Data Blacklist (ZBL)
Organization
Mailspike
Zone
z.mailspike.net
Type
IP
Impact
Medium
Delisting
Manual
NoSolicitado Blacklist
Organization
NoSolicitado
Zone
bl.nosolicitado.org
Type
IP
Impact
Medium
Delisting
Manual
NoSolicitado Worst Blacklist
Organization
NoSolicitado
Zone
bl.worst.nosolicitado.org
Type
IP
Impact
Medium
Delisting
Manual
Spamhaus Zero Reputation Domain (ZRD)
Organization
Spamhaus
Zone
zrd.dq.spamhaus.net
Type
Domain
Impact
Medium
Delisting
Automatic
SURBL Multi Blacklist
Organization
SURBL
Zone
multi.surbl.org
Type
Domain or IP
Impact
Medium
Delisting
Manual
UCEPROTECT DNSBL Level 1
Organization
UCEPROTECT
Zone
dnsbl-1.uceprotect.net
Type
IP
Impact
Medium
Delisting
Manual
URIBL Black Domain Name Blacklist
Organization
URIBL
Zone
black.uribl.com
Type
Domain
Impact
Medium
Delisting
Manual
URIBL Grey Domain Name Blacklist
Organization
URIBL
Zone
grey.uribl.com
Type
Domain
Impact
Medium
Delisting
Manual
URIBL Multi Domain Name Blacklist
Organization
URIBL
Zone
multi.uribl.com
Type
Domain
Impact
Medium
Delisting
Manual
URIBL Red Domain Name Blacklist
Organization
URIBL
Zone
red.uribl.com
Type
Domain
Impact
Medium
Delisting
Manual
8086 Consultancy MSRBL Combined Realtime Blacklist (RBL)
Organization
8086 Consultancy
Zone
combined.rbl.msrbl.net
Type
IP
Impact
Low
Delisting
Automatic
8086 Consultancy MSRBL Images Realtime Blacklist (RBL)
Organization
8086 Consultancy
Zone
images.rbl.msrbl.net
Type
IP
Impact
Low
Delisting
Automatic
8086 Consultancy MSRBL Phishing Realtime Blacklist (RBL)
Organization
8086 Consultancy
Zone
phishing.rbl.msrbl.net
Type
IP
Impact
Low
Delisting
Automatic
8086 Consultancy MSRBL Spam Realtime Blacklist (RBL)
Organization
8086 Consultancy
Zone
spam.rbl.msrbl.net
Type
IP
Impact
Low
Delisting
Automatic
8086 Consultancy MSRBL Virus Realtime Blacklist (RBL)
Organization
8086 Consultancy
Zone
virus.rbl.msrbl.net
Type
IP
Impact
Low
Delisting
Automatic
abuse.ro Domain Blacklist (DBL)
Organization
abuse.ro
Zone
dbl.abuse.ro
Type
Domain
Impact
Low
Delisting
Manual
abuse.ro Policy Block List (PBL)
Organization
abuse.ro
Zone
pbl.abuse.ro
Type
IP
Impact
Low
Delisting
Manual
abuse.ro Realtime Block List (RBL)
Organization
abuse.ro
Zone
rbl.abuse.ro
Type
IP
Impact
Low
Delisting
Manual
abuse.ro Uniform Resource Identifier Blacklist (URIBL)
Organization
abuse.ro
Zone
uribl.abuse.ro
Type
Domain
Impact
Low
Delisting
Manual
ALPHANET Blackholes RBL DNS Blacklist
Organization
ALPHANET
Zone
blackholes.alphanet.ch
Type
IP
Impact
Low
Delisting
Manual
Anonmails DNSBL
Organization
Anonmails
Zone
spam.dnsbl.anonmails.de
Type
IP
Impact
Low
Delisting
Manual
Ascams Block Scoring List
Organization
Ascams
Zone
block.ascams.com
Type
Score
Impact
Low
Delisting
Manual
Ascams DNSBL Block List
Organization
Ascams
Zone
dnsbl.ascams.com
Type
IP
Impact
Low
Delisting
Manual
Ascams Mix Scoring Black List (SBL)
Organization
Ascams
Zone
mix.ascams.com
Type
Score
Impact
Low
Delisting
Manual
Ascams Super Block Scoring List
Organization
Ascams
Zone
superblock.ascams.com
Type
Score
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Blocklist (RBL)
Organization
BLOCKEDSERVERS
Zone
rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Netscan Blocklist
Organization
BLOCKEDSERVERS
Zone
netscan.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Spam Blocklist
Organization
BLOCKEDSERVERS
Zone
spam.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
BLOCKEDSERVERS Torexit Blocklist
Organization
BLOCKEDSERVERS
Zone
torexit.rbl.blockedservers.com
Type
IP
Impact
Low
Delisting
Manual
Brukalai.lt Black DNSBL Blacklist
Organization
Brukalai.lt
Zone
black.dnsbl.brukalai.lt
Type
Domain or IP
Impact
Low
Delisting
Manual
Brukalai.lt Light DNSBL Blacklist
Organization
Brukalai.lt
Zone
light.dnsbl.brukalai.lt
Type
Domain or IP
Impact
Low
Delisting
Manual
Calivent Networks DNSBL Peru Blacklist
Organization
Calivent Networks
Zone
dnsbl.calivent.com.pe
Type
IP
Impact
Low
Delisting
Manual
dan.me.uk DAN TOR DNS Blacklist
Organization
dan.me.uk
Zone
tor.dan.me.uk
Type
IP
Impact
Low
Delisting
Automatic
dan.me.uk DAN TOREXIT DNS Blacklist
Organization
dan.me.uk
Zone
torexit.dan.me.uk
Type
IP
Impact
Low
Delisting
Automatic
DrMx DNS Realtime Black List
Organization
DrMx
Zone
bl.drmx.org
Type
IP
Impact
Low
Delisting
Manual
DroneBL DNSBL
Organization
DroneBL
Zone
dnsbl.dronebl.org
Type
IP
Impact
Low
Delisting
Manual
EFnet RBL
Organization
EFnet
Zone
rbl.efnetrbl.org
Type
IP
Impact
Low
Delisting
Manual
Fabel Spamsources
Organization
Fabel
Zone
spamsources.fabel.dk
Type
IP
Impact
Low
Delisting
Manual
GBUdb Truncate DNSBL
Organization
GBUdb
Zone
truncate.gbudb.net
Type
IP
Impact
Low
Delisting
Automatic
ImproWare Swinog Realtime blacklist
Organization
ImproWare
Zone
dnsrbl.swinog.ch
Type
IP
Impact
Low
Delisting
Manual
ImproWare Swinog Realtime URI Blacklist (URIBL)
Organization
ImproWare
Zone
uribl.swinog.ch
Type
Domain
Impact
Low
Delisting
Manual
ImproWare Swinog Spam URIBL
Organization
ImproWare
Zone
spamrbl.swinog.ch
Type
Domain
Impact
Low
Delisting
Manual
JIPPG Technologies Relay Blackhole List Project Blacklist
Organization
JIPPG Technologies
Zone
mail-abuse.blacklist.jippg.org
Type
IP
Impact
Low
Delisting
Manual
Junk Email Filter Hostkarma Blacklist
Organization
Junk Email Filter
Zone
hostkarma.junkemailfilter.com
Type
Score
Impact
Low
Delisting
Manual
JustSpam Blacklist
Organization
JustSpam
Zone
dnsbl.justspam.org
Type
IP
Impact
Low
Delisting
Manual
Kempt.net DNS Black List (DNSBL)
Organization
Kempt.net
Zone
dnsbl.kempt.net
Type
IP
Impact
Low
Delisting
Automatic
Mail Baby Interserver Realtime Blocklist (RBL)
Organization
Mail Baby
Zone
rbl.interserver.net
Type
IP
Impact
Low
Delisting
Automatic
Mail Baby Interserver Realtime URI Blacklist (URIBL)
Organization
Mail Baby
Zone
rbluri.interserver.net
Type
Domain
Impact
Low
Delisting
Automatic
Mail Baby Interserver SpamAssassin Realtime Blocklist (RBL)
Organization
Mail Baby
Zone
rblspamassassin.interserver.net
Type
IP
Impact
Low
Delisting
Automatic
NordSpam Domain Name Blacklist (DBL)
Organization
NordSpam
Zone
dbl.nordspam.com
Type
Domain
Impact
Low
Delisting
Manual
NordSpam IP Address Blacklist (BL)
Organization
NordSpam
Zone
bl.nordspam.com
Type
IP
Impact
Low
Delisting
Manual
nsZones Dial-Up/Cable/ADSL Block List (DYN)
Organization
nsZones
Zone
dyn.nszones.com
Type
IP
Impact
Low
Delisting
Manual
nsZones DNSBL Block List (BL)
Organization
nsZones
Zone
bl.nszones.com
Type
IP
Impact
Low
Delisting
Manual
nsZones Spam Source Block List (SBL)
Organization
nsZones
Zone
sbl.nszones.com
Type
IP
Impact
Low
Delisting
Manual
nsZones SURBL/Spam URI Realtime Block List (UBL)
Organization
nsZones
Zone
ubl.nszones.com
Type
Domain
Impact
Low
Delisting
Manual
Polspam Blacklist (BL)
Organization
Polspam
Zone
bl.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Dynamic IP Blacklist (BL)
Organization
Polspam
Zone
bl-h4.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 1 Blacklist (BL)
Organization
Polspam
Zone
bl-h1.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 2 Blacklist (BL)
Organization
Polspam
Zone
bl-h2.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam Level 3 Blacklist (BL)
Organization
Polspam
Zone
bl-h3.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Blacklist
Organization
Polspam
Zone
rhsbl.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Danger Blacklist
Organization
Polspam
Zone
rhsbl-danger.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Hard Blacklist
Organization
Polspam
Zone
rhsbl-h.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam RHSBL RBL Very Hard Blacklist
Organization
Polspam
Zone
rhsbl-v.rbl.polspam.pl
Type
Domain
Impact
Low
Delisting
Manual
Polspam Wrong Reverse Blacklist (BL)
Organization
Polspam
Zone
bl-h5.rbl.polspam.pl
Type
IP
Impact
Low
Delisting
Manual
RedHawk SpamHawk Blacklist
Organization
RedHawk
Zone
access.redhawk.org
Type
IP
Impact
Low
Delisting
Manual
RV-SOFT Technology RVS-TECH DNSBL
Organization
RV-SOFT Technology
Zone
dnsbl.rv-soft.info
Type
IP
Impact
Low
Delisting
Automatic
Schulte DNS Based Spam Block List (RBL)
Organization
Schulte
Zone
rbl.schulte.org
Type
IP
Impact
Low
Delisting
Manual
Scientific Spam Blocklist (BL)
Organization
Scientific Spam
Zone
bl.scientificspam.net
Type
IP
Impact
Low
Delisting
Manual
Scientific Spam RHSBL
Organization
Scientific Spam
Zone
rhsbl.scientificspam.net
Type
Domain
Impact
Low
Delisting
Manual
Spam Eating Monkey SEM BLACK
Organization
Spam Eating Monkey
Zone
bl.spameatingmonkey.net
Type
IP
Impact
Low
Delisting
Manual
Spam Eating Monkey SEM-BACKSCATTER
Organization
Spam Eating Monkey
Zone
backscatter.spameatingmonkey.net
Type
IP
Impact
Low
Delisting
Manual
Spam Eating Monkey SEM-FRESH
Organization
Spam Eating Monkey
Zone
fresh.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-FRESH10
Organization
Spam Eating Monkey
Zone
fresh10.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-FRESH15
Organization
Spam Eating Monkey
Zone
fresh15.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-FRESH30
Organization
Spam Eating Monkey
Zone
fresh30.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-FRESHZERO
Organization
Spam Eating Monkey
Zone
freshzero.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-URI
Organization
Spam Eating Monkey
Zone
uribl.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Automatic
Spam Eating Monkey SEM-URIRED
Organization
Spam Eating Monkey
Zone
urired.spameatingmonkey.net
Type
Domain
Impact
Low
Delisting
Manual
Spamikaze Passive Spam Block List (PSBL)
Organization
Spamikaze
Zone
psbl.surriel.com
Type
IP
Impact
Low
Delisting
Manual
SpamRATS RATS Auth Blacklist
Organization
SpamRATS
Zone
auth.spamrats.com
Type
IP
Impact
Low
Delisting
Manual
SpamRATS RATS Dyna Blacklist
Organization
SpamRATS
Zone
dyna.spamrats.com
Type
IP
Impact
Low
Delisting
Manual
SpamRATS RATS NoPtr Blacklist
Organization
SpamRATS
Zone
noptr.spamrats.com
Type
IP
Impact
Low
Delisting
Manual
SpamRATS RATS Spam Blacklist
Organization
SpamRATS
Zone
spam.spamrats.com
Type
IP
Impact
Low
Delisting
Manual
SPFBL DNSBL
Organization
SPFBL
Zone
dnsbl.spfbl.net
Type
IP
Impact
Low
Delisting
Manual
SPFBL URIBL
Organization
SPFBL
Zone
uribl.spfbl.net
Type
IP
Impact
Low
Delisting
Manual
Suomispam Blacklist (BL)
Organization
Suomispam
Zone
bl.suomispam.net
Type
IP
Impact
Low
Delisting
Manual
Suomispam Domain Blocklist (DBL)
Organization
Suomispam
Zone
dbl.suomispam.net
Type
Domain
Impact
Low
Delisting
Manual
Suomispam Gray List (GL)
Organization
Suomispam
Zone
gl.suomispam.net
Type
IP
Impact
Low
Delisting
Manual
System 5 Hosting s5h.net Realtime Blacklist (RBL)
Organization
System 5 Hosting
Zone
all.s5h.net
Type
IP
Impact
Low
Delisting
Manual
Taughannock Networks South Korean Network Blocking List
Organization
Taughannock Networks
Zone
korea.services.net
Type
IP
Impact
Low
Delisting
Manual
Team Cymru Bogons Blacklist
Organization
Team Cymru
Zone
bogons.cymru.com
Type
IP
Impact
Low
Delisting
Manual
Team Cymru IPv4 Full Bogons Blacklist
Organization
Team Cymru
Zone
v4.fullbogons.cymru.com
Type
IP
Impact
Low
Delisting
Manual
Tornevall Networks DNS-based Blackhole List (DNSBL)
Organization
Tornevall Networks
Zone
dnsbl.tornevall.org
Type
IP
Impact
Low
Delisting
Manual
Tornevall Networks Fraud Blacklist (FraudBL)
Organization
Tornevall Networks
Zone
bl.fraudbl.org
Type
IP
Impact
Low
Delisting
Manual
UCEPROTECT BACKSCATTERER Blacklist
Organization
UCEPROTECT
Zone
ips.backscatterer.org
Type
IP
Impact
Low
Delisting
Automatic
UCEPROTECT DNSBL Level 2
Organization
UCEPROTECT
Zone
dnsbl-2.uceprotect.net
Type
IP
Impact
Low
Delisting
Manual
UCEPROTECT DNSBL Level 3
Organization
UCEPROTECT
Zone
dnsbl-3.uceprotect.net
Type
IP
Impact
Low
Delisting
Manual
Validity Sender Score Return Path Blocklist (RPBL)
Organization
Validity
Zone
bl.score.senderscore.com
Type
IP
Impact
Low
Delisting
Manual
www.blocklist.de Fail2Ban-Reporting Service BlockList.de
Organization
www.blocklist.de Fail2Ban-Reporting Service
Zone
bl.blocklist.de
Type
IP
Impact
Low
Delisting
Manual
ZapBL DNSBL
Organization
ZapBL
Zone
dnsbl.zapbl.net
Type
IP
Impact
Low
Delisting
Manual
ZapBL RHSBL
Organization
ZapBL
Zone
rhsbl.zapbl.net
Type
Domain
Impact
Low
Delisting
Manual
2stepback.dk Spam Block List
Organization
2stepback.dk
Zone
sbl.2stepback.dk
Type
IP
Impact
Inactive
Delisting
Manual
Fayntic Services FaynticRBL Blacklist
Organization
Fayntic Services
Zone
rbl.faynticrbl.org
Type
IP
Impact
Inactive
Delisting
Manual
ORB UK Open Relay Block Zone (ORBZ) Inputs
Organization
ORB UK
Zone
orbz.gst-group.co.uk
Type
IP
Impact
Inactive
Delisting
Manual
ORB UK Open Relay Block Zone (ORBZ) Manual
Organization
ORB UK
Zone
manual.orbz.gst-group.co.uk
Type
IP
Impact
Inactive
Delisting
Manual
technoirc.org DNSBL Blacklist
Organization
technoirc.org
Zone
dnsbl.technoirc.org
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Bad Whois Blacklist
Organization
TechTheft
Zone
bad.whois.bl.techtheft.info
Type
Domain
Impact
Inactive
Delisting
Manual
TechTheft Blacklist
Organization
TechTheft
Zone
bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Bogon Blacklist
Organization
TechTheft
Zone
bogon.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Conferr Blacklist
Organization
TechTheft
Zone
conferr.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Domain Blacklist
Organization
TechTheft
Zone
domain.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Expanded Blacklist
Organization
TechTheft
Zone
expanded.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft ISP Blacklist
Organization
TechTheft
Zone
isp.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Nana Blacklist
Organization
TechTheft
Zone
nana.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Other Blacklist
Organization
TechTheft
Zone
other.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Robot Blacklist
Organization
TechTheft
Zone
robot.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Scanning Blacklist
Organization
TechTheft
Zone
scanning.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Source Blacklist
Organization
TechTheft
Zone
source.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Support Blacklist
Organization
TechTheft
Zone
support.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Virus Blacklist
Organization
TechTheft
Zone
virus.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Watchlist Blacklist
Organization
TechTheft
Zone
watchlist.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
TechTheft Web Blacklist
Organization
TechTheft
Zone
web.bl.techtheft.info
Type
IP
Impact
Inactive
Delisting
Manual
Definition

What is a blocklist?

A blocklist, often called a blacklist, is a real-time database of IPs and domains with a poor reputation. The most common types are the Real-time Blackhole List (RBL) and the DNS-based Blackhole List (DNSBL), which are used by providers to reject malicious mail. There's also new types of hash based blocklists that are used to block emails based on their content.
Removal process

How do I get removed from a blocklist?

You must first identify which list has listed you, as each blocklist operator maintains its own unique delisting process, some are also automated. After fixing the root cause, you must visit their website to request removal, a process that can vary significantly from one list to another. Visit our specific blocklist pages above for detailed removal instructions.
Causes

How do you get blocklisted?

Listings occur for many reasons and are dependent on the blacklist operator. A high spam complaint rate can land you on a spam-focused list (SBL), sending from a compromised PC on an exploits list (XBL), using a residential IP on a policy list (PBL), or including bad links can get your domain listed (URIBL or DBL).
Monitoring

How can I monitor blocklists?

Proactive monitoring is key to protecting your reputation across the hundreds of active email blacklists, including combined, domain-based (RHSBL), and new-domain lists (ZRD). Our platform gives you the ability to monitor all blocklists in real-time and provides instant notifications when an issue is detected. Sign up to get started.

Blocklist guides

19 resources
What is a DNSBL and how does it affect email deliverability?
What is a DNSBL and how does it affect email deliverability?
Learn what a DNSBL (Domain Name System-based Blackhole List) is, how it works, and why it's a critical factor in your email deliverability. Understand how you can get listed and what to do to resolve it.
Blocklist guide
A guide to RBLs (real-time blackhole lists)
A guide to RBLs (real-time blackhole lists)
Learn what a Real-time Blackhole List (RBL) is and how it impacts your email deliverability. This guide covers how RBLs work, why your domain or IP might get on a blacklist (or blocklist), and the crucial steps to check your status and request removal. Understand the importance of fixing the root cause to maintain a clean sending reputation.
Blocklist guide
A brief history of email blacklists and blocklists
A brief history of email blacklists and blocklists
Explore the fascinating history of email blacklists and blocklists, from their origins as simple text files in the 1990s to their role in today's complex email deliverability landscape. Learn how these spam-fighting tools evolved, the controversies they sparked, and why they remain a critical component for any email sender to monitor and understand.
Blocklist guide
The difference between a blacklist and a blocklist
The difference between a blacklist and a blocklist
Learn the difference between the terms 'blacklist' and 'blocklist' in the context of email deliverability. Understand why the industry is shifting terminology and what it means for your email strategy.
Blocklist guide
How email blacklists actually work: a simple guide
How email blacklists actually work: a simple guide
Learn how email blacklists (or blocklists) actually work, from what they are and why they exist to the common reasons you might end up on one. We'll cover the difference between IP and domain blacklisting, the signals that anti-spam services look for, and how you can check if your domain has been flagged. Ultimately, understanding this system is the key to improving your sending practices and ensuring your emails reach the inbox.
Blocklist guide
Spam traps: what they are and how they work
Spam traps: what they are and how they work
Spam traps, or honeypots, are a tool used by internet service providers and anti-spam organizations to identify senders with poor email practices. Hitting one can severely damage your sender reputation, leading to your emails being blocked or sent to the spam folder. This guide explains the different types of spam traps, how you might hit one, and most importantly, the proactive steps you can take- like practicing good list hygiene and using double opt-in- to keep your email lists clean and your deliverability high.
Blocklist guide
A guide to the different types of email blocklists
A guide to the different types of email blocklists
Learn about the different types of email blocklists (also known as blacklists) and how they impact your email deliverability. This guide breaks down IP-based, domain-based, public, and private blocklists, explaining how you can get listed and, more importantly, how to stay off them. Understand the crucial role of sender reputation and proactive monitoring to ensure your emails reach the inbox.
Blocklist guide
Public vs private blacklists: what's the difference?
Public vs private blacklists: what's the difference?
Learn the critical difference between public and private email blocklists. This post breaks down how each type of blacklist works, why you might get listed, and the specific steps you need to take to get removed. Understand that public lists like Spamhaus are transparent, while private lists from providers like Gmail and Microsoft are internal and require a different approach to fix your deliverability.
Blocklist guide
What are the different types of spam traps and how do they work?
What are the different types of spam traps and how do they work?
Learn about the different kinds of email spam traps, from pristine honeypots designed to catch spammers to recycled addresses from inactive users. This guide explains what they are, how they can damage your sender reputation and land you on a blacklist, and provides actionable steps for maintaining a clean email list to avoid them.
Blocklist guide
What happens when your domain is on an email blacklist?
What happens when your domain is on an email blacklist?
Discover the far-reaching impact of being on an email blocklist or blacklist. This article explores how being listed affects your email deliverability, damages your sender reputation, and disrupts business operations. Learn about the immediate consequences, the long-term reputational harm, and the steps required for recovery and prevention to keep your crucial email channels open.
Blocklist guide
What does it mean when your email is blacklisted?
What does it mean when your email is blacklisted?
Learn what it means to be on an email blacklist, also known as a blocklist. This guide explains why domains and IPs get blacklisted, how these lists work, and the impact they have on your email deliverability. Discover the steps to check if you're on a blacklist and the process for getting removed to restore your sender reputation.
Blocklist guide
What is an email blacklist and how does it work?
What is an email blacklist and how does it work?
An email blacklist, or blocklist, is a real-time database of IP addresses and domains that are blocked by mail servers due to a history of sending spam. Being listed can severely impact your email deliverability. This guide explains what email blacklists are, how they work, the common reasons for being listed such as high spam complaints or poor list hygiene, and the steps you can take to check your status, request removal, and prevent it from happening again.
Blocklist guide
What is email backscatter and how to stop it
What is email backscatter and how to stop it
Ever received a bounce message for an email you never sent? This phenomenon is called email backscatter, and it occurs when spammers spoof your email address. This guide explains how backscatter happens, the dangers it poses to your sender reputation and its potential to land you on a blacklist. Learn how to protect your domain from this disruptive issue using email authentication like SPF, DKIM, and DMARC.
Blocklist guide
A guide to the blacklists yahoo mail uses
A guide to the blacklists yahoo mail uses
Wondering why your emails aren't reaching Yahoo users? Yahoo Mail uses a sophisticated system to filter spam, relying on a combination of well-known public blacklists, like Spamhaus, and its own private, internal blocklist. This guide explains how this hybrid system works, how you can determine if you've been listed, and the steps you need to take to repair your sender reputation and get your emails back into the inbox.
Blocklist guide
How your email address ends up on a blacklist
How your email address ends up on a blacklist
Getting your email address or domain on a blacklist is a common but serious deliverability issue that prevents your messages from reaching the inbox. This typically happens due to specific sending practices, such as high spam complaint rates, poor list hygiene that leads to hitting spam traps, and suspicious sending behavior. This post explains the primary reasons you might get blacklisted and outlines the steps necessary to diagnose the problem, get removed from blocklists, and prevent it from happening again through proactive reputation management.
Blocklist guide
What happens when your domain is put on a blocklist?
What happens when your domain is put on a blocklist?
Discover what happens when your domain is blocklisted, from immediate email deliverability failures to long-term reputation damage. Learn the common causes, such as high spam complaints and poor list hygiene, and understand the steps to check your status and begin the recovery process.
Blocklist guide
A practical guide to understanding your email domain reputation
A practical guide to understanding your email domain reputation
Learn what email domain reputation is and why it's more important than ever for your email deliverability. This guide covers the key components of your reputation score, the difference between IP and domain reputation, and practical steps you can take to monitor, protect, and improve this critical marketing asset.
Blocklist guide
Understanding email greylisting and how it works
Understanding email greylisting and how it works
A deep dive into email greylisting, a common anti-spam technique. This post explains how greylisting works by temporarily delaying unknown emails, discusses its pros and cons, compares it to blacklisting, and offers guidance for senders to ensure their legitimate emails aren't overly impacted by this filtering method.
Blocklist guide
What happens when your IP gets blocklisted?
What happens when your IP gets blocklisted?
Discover what happens when your IP address gets blocklisted and how it impacts your email deliverability and web access. This guide explains the common reasons for being blacklisted, from high spam complaints to compromised systems, and outlines the immediate consequences. Learn how to check if your IP is on a blacklist and the essential steps to get it removed and, most importantly, how to prevent it from happening again.
Blocklist guide
What are examples of insignificant or ineffective email blocklists?
How to remove IP address from Spamhaus PBL list?
What is the impact of being on the UCEPROTECTL3 blacklist and how to deal with it?
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