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CLOUDEK · Email health

Email health check, DMARC report analyzer and .eml checker

Check email DNS for a domain in one click: MX, SPF, DMARC, common DKIM selectors, MTA-STS, TLS-RPT and BIMI with a transparent score. Drop DMARC aggregate reports or .eml files to analyse them locally.

✓EMAIL HEALTH

Email health check, DMARC report analyzer and .eml checker

Check a domain's MX, SPF, DMARC, DKIM, MTA-STS, TLS-RPT and BIMI records in one click, then drop DMARC aggregate reports or .eml messages on the page to analyse them locally.

1. Check a domain

Only DNS names (for example _dmarc.example.com) are sent to Cloudflare public DNS after you press the button. DKIM selectors cannot be listed from DNS: about 23 common ones are tried, and a real message reveals the true selector in its DKIM-Signature s= tag.

2. Analyse DMARC reports and emails

Drop files or folders hereDMARC aggregate reports (.xml, .xml.gz, .gz, .zip) and .eml messages, up to 200 files and 25 MB per run. Nothing is uploaded; files are read in this browser.
No files read yet.

DMARC compliance here works by upload: this page never reads a mailbox. Failure (forensic, ruf) reports can contain message content, so they stay in the browser and are not offered to AI. The .eml DKIM check is a second opinion; the receiving server's Authentication-Results is authoritative. Scores are a rule-based guide, not a deliverability guarantee.

Use this result carefully

Check email DNS for a domain in one click: MX, SPF, DMARC, common DKIM selectors, MTA-STS, TLS-RPT and BIMI with a transparent score. Drop DMARC aggregate reports or .eml files to analyse them locally.

Review the limits and privacy notes shown with the tool. Important configuration or security decisions should be checked against authoritative systems and your organization’s approved procedures.

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