Tools for diagnosing and configuring email authentication (SPF, DKIM, DMARC). Everything runs in your browser, and nothing is uploaded.
/email/headers
Email Header Analyzer
Paste raw headers to read SPF, DKIM, and DMARC results, the hop-by-hop delivery path with delays, and plain-English flags.
/email/dkim
DKIM Key Generator
Generate an RSA DKIM keypair: the public TXT record for your DNS and the private key for your mail server.
Want to see what a domain publishes? Check your domain's SPF, DKIM, and DMARC records in the Domain Inspector.