Being blacklisted means major email providers may reject or filter your messages. This guide walks you through identifying the listing, fixing the root cause, requesting removal, and preventing future listings.

Step 1 — Confirm the listing

Use our blacklist checker to see exactly which RBLs list your IP or domain. Common RBLs include:

Spamhaus — Highly influential; listings have severe impact
Barracuda — Widely used by enterprise filters
SpamCop — Triggered by spam complaints
SURBL — Domain-based, often caused by phishing or malware links
URIBL — Domain reputation list

Run blacklist check →

Step 2 — Investigate the root cause

Before requesting removal, you must fix what caused the listing. Common causes:

Compromised user account sending spam
Open relay or misconfigured mail server
High bounce rates or purchased email lists
Malware or phishing content hosted on your domain
Missing or incorrect SPF/DKIM/DMARC records
Cold IP with no reputation sending high volume suddenly

Step 3 — Fix the problem

Actions to take before requesting removal:

Reset compromised account passwords and enable MFA
Close open relays and restrict outbound SMTP to authenticated users
Remove malware, phishing pages, or malicious redirects from your website
Implement double opt-in and stop sending to purchased or old lists
Publish correct SPF, DKIM, and DMARC records
Set up reverse DNS (PTR) for your sending IP

Step 4 — Request delisting

Each RBL has its own removal process:

Spamhaus: Visit spamhaus.org/lookup and follow the removal instructions for your specific listing code (SBL, CSS, XBL, PBL).
Barracuda: Use the Barracuda removal form. You may need to create a free account.
SpamCop: Listings usually expire automatically within 24–72 hours after the spam flow stops. No manual removal is required.
SURBL: Submit a removal request through their official site after cleaning malicious content.

Step 5 — Prevent re-listing

After removal, adopt these practices to stay off blacklists:

Monitor your IP and domain weekly using automated blacklist checks
Keep your mail server and CMS patched to prevent compromise
Maintain a low complaint rate (under 0.1% of sent volume)
Use a dedicated IP for transactional mail and another for marketing
Warm up new IPs gradually over 2–4 weeks

Critical reminder

Never request removal before fixing the root cause. RBLs track repeat offenders. Multiple removal requests without fixing the problem can lead to permanent or extended listings that require paid remediation or legal appeal.

Email Blacklist Removal Guide