How do I get delisted?

Identify the root cause (compromised server, poor list hygiene, authentication gaps), fix it, then follow each list's official delisting process.

Free tools

Email blacklist checker

Enter your outbound sending IPv4 address or domain. MailFleet resolves DNS and queries each DNSBL zone, showing listing status, response codes, operator links, and delisting resources.

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What this checks

Live DNSBL queries across 30 major blocklists (Spamhaus ZEN/DBL, SpamCop, Barracuda, SORBS, UCEPROTECT, PSBL, SpamRATS, and more).

Why it matters

Blacklist listings cause widespread delivery failures. Real-time DNSBL checks help you fix abuse, authentication, or infrastructure issues before sending.

DNSBL blacklist scan

Checks 30 DNS-based blocklists. Enter your sending IP or domain.

Enter a domain or IP above to scan 30 DNSBLs used by deliverability teams worldwide.

DNSBL results depend on the resolver performing the query. Production scans on mailfleet.app use server-side DNS (cPanel PHP) for accuracy. Spamhaus and some lists may block public DNS resolvers — those show as "Resolver blocked" in browser-only mode. Reference: Spamhaus DNS blocklists.

Common issues

Checking only the domain when mail sends from a different IP or subdomain.
Ignoring recent listings after a compromised server or open relay incident.
Assuming delisting alone fixes reputation without list hygiene changes.

How to fix

Verify SPF, DKIM, and DMARC for the sending domain.
Remove compromised hosts from rotation and request delisting per list policy.
Warm up permission-based lists gradually after remediation.

How MailFleet helps

MailFleet combines blacklist awareness with provider profiles, campaign logs, and pre-send diagnostics so teams catch reputation issues before large permission-based sends.

Delivery note: MailFleet helps users manage campaigns through their own sending providers. Delivery outcomes depend on sender reputation, DNS authentication, content quality, recipient engagement, list quality, provider rules, and mailbox filtering systems.

For regulatory context on commercial email in the United States, see the FTC CAN-SPAM compliance guide.

Frequently asked questions

An email blacklist (DNSBL) is a list of IPs or domains associated with spam or abuse. Mailbox providers and filters may block mail from listed sources.

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Available on

Windows 10+
macOS 12+
Linux (DEB & RPM)

Same desktop experience across every platform — one workflow for your entire team.