Blacklist removal guides
How to get delisted, list by list
Every blacklist has its own causes, its own removal process and its own timeline. These 21 guides cover each list our free blacklist checker queries: what the listing means, why it happened, the exact delisting steps and how long they take.
Widely enforced by major providers and gateways. A listing here blocks real mail today; start with these.
Spamhaus ZEN
zen.spamhaus.org
Combined SBL + XBL + PBL. The most widely used blacklist by major providers.
Removal guideSpamhaus SBL
sbl.spamhaus.org
Spamhaus Block List — direct spam sources, hijacked servers, spam gangs.
Removal guideSpamhaus XBL
xbl.spamhaus.org
Exploits Block List — hijacked PCs, open proxies, malware-infected machines.
Removal guideSpamCop BL
bl.spamcop.net
User-reported spam sources. High accuracy, short listing durations.
Removal guideBarracuda Reputation
b.barracudacentral.org
Barracuda Networks reputation database. Used by Barracuda email gateways worldwide.
Removal guideMeaningful reach through corporate filters and scoring systems. Worth resolving promptly.
Spamhaus PBL
pbl.spamhaus.org
Policy Block List — end-user IPs not authorised to send direct-to-MX email.
Removal guideSORBS Aggregate
dnsbl.sorbs.net
SORBS combined zone — spam, proxies, zombies, and more. Note: intermittent availability.
Removal guideSORBS Spam
spam.dnsbl.sorbs.net
SORBS spam zone — IPs that have sent spam to SORBS spam traps.
Removal guideCBL Abuseat
cbl.abuseat.org
Composite Blocking List — IPs sending spam via malware, botnets, or open proxies.
Removal guideUCEPROTECT Level 1
dnsbl-1.uceprotect.net
Individual IPs that have sent spam to UCEPROTECT spam traps.
Removal guideSmaller footprints, useful mainly as diagnostic signals. Fix the cause; weigh the listing itself calmly.
SORBS New Spam
new.spam.dnsbl.sorbs.net
SORBS newly detected spam sources (last 28 days).
Removal guideUCEPROTECT Level 2
dnsbl-2.uceprotect.net
Entire IP ranges where too many IPs are listed. Your IP may be listed even if it has never sent spam — entire netblocks are listed.
Removal guideUCEPROTECT Level 3
dnsbl-3.uceprotect.net
Entire ASNs (providers) where too many IPs are listed. Your IP may be listed purely due to your hosting provider's other customers.
Removal guidePSBL
psbl.surriel.com
Passive Spam Block List — spam trap based list with easy self-delisting.
Removal guideDroneBL
dnsbl.dronebl.org
Real-time botnet and drone tracking database.
Removal guide0spam BL
bl.0spam.org
Spam block list maintained by 0spam.org.
Removal guideGBUdb Truncate
truncate.gbudb.net
GBUdb good/bad/ugly database — reputation tracking for IP behavior patterns.
Removal guideIMP Spam RBL
spamrbl.imp.ch
Swiss spam tracking list maintained by IMP Group.
Removal guideInterServer RBL
rbl.interserver.net
InterServer real-time blacklist for spam and abusive IP addresses.
Removal guideJunkEmailFilter BL
black.junkemailfilter.com
JunkEmailFilter.com blacklist of known spam and malicious senders.
Removal guideDigiBase Spambot
spambot.bls.digibase.ca
DigiBase spambot tracking list — IPs identified as active spambots.
Removal guideNot sure which lists flagged you?
Run your domain or IP through the checker first. Every flagged result links straight to the matching removal guide on this page.