Blocklist Removal
Email Blocklist Removal Guides
If your sending IP or domain has been listed on a DNSBL, the path back to the inbox runs through the blocklist operator's own delisting form — and every list works differently. These guides walk you through the real removal URL, the realistic timeline, and the root-cause fix you have to ship before requesting removal (otherwise you re-list within hours).
Barracuda Networks
Barracuda BRBL
b.barracudacentral.org
Remove your IP from the Barracuda Reputation Block List (BRBL). Real delisting form URL, 24-48 hour timeline, and what Barracuda evaluates.
Delisting guide →abuseat.org / Spamhaus
CBL (Composite Blocking List)
cbl.abuseat.org
Remove your IP from the Composite Blocking List (CBL) at abuseat.org. Self-service automated removal in minutes once the exploit is fixed.
Delisting guide →JustSpam.org
JustSpam
dnsbl.justspam.org
Remove your IP from JustSpam.org's DNSBL. Honeypot-driven listing with automatic expiration after clean sending. Real lookup URL.
Delisting guide →Mailspike Reputation Network
Mailspike
bl.mailspike.net
How to remove your IP from the Mailspike blocking list. Reputation-based DNSBL with automatic expiration; real lookup URL and 24-72 hour typical timeline.
Delisting guide →psbl.org / Rik van Riel
PSBL (Passive Spam Block List)
psbl.surriel.com
How to remove your IP from the Passive Spam Block List (PSBL). Simple self-service removal at psbl.org. Real removal URL and typical 1-hour timeline.
Delisting guide →Proofpoint (formerly SORBS Foundation)
SORBS
dnsbl.sorbs.net
Remove your IP from SORBS (Spam and Open Relay Blocking System). Real delisting URL, sub-zone breakdown, and SORBS's slow review process.
Delisting guide →Cisco Talos (SpamCop division)
SpamCop
bl.spamcop.net
Remove your IP from the SpamCop Blocking List (SCBL). Automatic expiration in 24-48 hours after the last report, plus manual review path.
Delisting guide →Spamhaus Project
Spamhaus DBL
dbl.spamhaus.org
Remove your DOMAIN from Spamhaus DBL — the URI-based zone listing spam-content domains and click-tracking redirects. Real removal URL and timeline.
Delisting guide →Spamhaus Project
Spamhaus PBL
pbl.spamhaus.org
Remove your IP from Spamhaus PBL — the zone for dynamic/end-user IPs not authorized to send mail directly. Instant self-service removal.
Delisting guide →Spamhaus Project
Spamhaus SBL
sbl.spamhaus.org
Remove your IP from the Spamhaus Block List (SBL) — the manually-curated zone for confirmed spam sources. Real removal URL and 24-72h timeline.
Delisting guide →Spamhaus Project
Spamhaus XBL
xbl.spamhaus.org
Remove your IP from Spamhaus XBL — the automated zone listing compromised hosts and open relays. Real CBL removal URL and 12-hour timeline.
Delisting guide →Spamhaus Project
Spamhaus ZEN
zen.spamhaus.org
Step-by-step delisting from Spamhaus ZEN — combined SBL+XBL+PBL zone used by Gmail, Outlook, and most mail servers. Real lookup URL and timeline.
Delisting guide →GBUdb / Message Sniffer
TRUNCATE
truncate.gbudb.net
How to remove your IP from the GBUdb TRUNCATE list. Statistical reputation-based DNSBL from Message Sniffer; real lookup URL and contact path for removal.
Delisting guide →UCEPROTECT-Network
UCEPROTECT Level 1
dnsbl-1.uceprotect.net
Remove your IP from UCEPROTECT Level 1. Automatic 7-day expiration, or controversial paid express delisting via Whitelisted.org. Real URL.
Delisting guide →UCEPROTECT-Network
UCEPROTECT Level 2
dnsbl-2.uceprotect.net
UCEPROTECT Level 2 is the controversial network-range zone. Many ESPs ignore it due to paid-delisting practices. Real lookup URL and honest framing.
Delisting guide →Stop Getting Listed In The First Place
The reason cold email senders end up on Spamhaus and Barracuda is almost always shared infrastructure — one bad neighbour on a shared IP poisons the whole range. ColdRelay gives each customer dedicated Microsoft 365 mailboxes on an isolated Azure tenant with dedicated IPs, so your reputation is entirely your own.
Get Dedicated Infrastructure →