SPF, DKIM & DMARC Checker – Free Email Auth Tool

Verify your domain's email authentication records. We check DNS for SPF (sender policy), DKIM (signing), and DMARC (policy and reporting) so you can fix misconfigurations and improve deliverability. Read the guide.

🔒 Privacy guaranteed. We never store your lookups.
Advanced DKIM options (optional)

Comma-separated. Use this when your provider uses custom selectors (e.g. Amazon SES).

Get told when your DNS records change

All features

Website Signals

Watch the website itself for distress. Downtime, an expired certificate, or a redirect to a new brand often shows up months before a name reaches the open market.

Complete Monitoring

All of the above on one watch: registration data, website health, auctions, marketplaces, and drop timing, at 20+ checks a day per domain.

More free domain tools

All tools

WHOIS and RDAP Lookup

Registrar, registrant, expiration, and name server data straight from the public record.

Blacklist Checker

See whether a domain is listed on major spam and security blocklists.

Renewal Cost Checker

Compare registration, renewal, and transfer pricing before you commit.