Threat / Brand

Blacklist Checker

Check whether a domain appears on common DNSBL-style lists exposed through the email-security surface.

About Blacklist Checks

DNSBL checks help identify whether a domain or its related sending infrastructure appears on public blocklists. This page surfaces the listing data returned by the existing frontend endpoint.

Why teams run this check

• See whether any blacklist detections are present
• Review listed versus clean counts quickly
• Support email-deliverability troubleshooting
• Spot domains that may need sender remediation

What to review

• Listed count and affected IPs
• Specific blacklist names returned
• Warnings or scoring notes
• Whether the domain appears clean or flagged

Use the free public result to review signals quickly, then move into the full workspace for continuous monitoring and deeper evidence.

PRO

Nodes Observed12

Resolved Nodes11

Dual-stack Coverage4 / 12

Refresh Window5m

PREVIEW

warningDKIM key strengthreview

errorMTA-STS missingfix

check_circleTLS-RPT not configuredinfo

PRO

PREVIEW

Real-time alertsDISABLED

Cadence—

Enable monitoring with a free account.

PRO

Unlock the full Blacklist Checker workspace

Create a free account to unlock full access

See full findings

Track this domain daily

Review change history

Get AI analysis

Export analyst-ready evidence