Email Authentication Checker
Check domain
Verify SPF, DKIM and DMARC records in real time
SPF
DKIM
DMARC
BIMI

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DNS & SSL lookup
Look up all record types at once or select a specific type

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WHOIS lookup
Registrar, dates and nameservers for domains — or network owner and range for IP addresses

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Blacklist check
Enter an IP address or domain — detected automatically

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Enter an IPv4 address to check it against common DNS blacklists.

MX Check
Test SMTP mail server TLS configuration, cipher suites and certificate
Recent checks
Your personal history — not shared with anyone and stored locally in this browser.