DKIM (DomainKeys Identified Mail) is an email authentication method that adds a digital signature to outgoing emails. The receiving server can verify this signature against a public key published in the sender's DNS records, confirming that the email was genuinely sent by the domain owner and wasn't altered in transit. DKIM works alongside SPF and DMARC to provide comprehensive email authentication.
FAQ
What is DKIM?
DKIM adds a cryptographic signature to your emails that receiving servers can verify, proving the email actually came from your domain and wasn't tampered with.