DKIM Checker Tool

DKIM (DomainKeys Identified Mail) uses cryptographic signatures to verify that an email hasn't been altered in transit and that it was authorized by the sending domain. It relies on a public key published in DNS under a specific selector.

This DKIM checker retrieves your selector's public key, validates record structure, and highlights common configuration issues. It helps you confirm that your DKIM setup is correctly published and ready to support email authentication and DMARC alignment.