DomainKeys Identified Mail—email authentication using digital signatures to verify sender identity.
DomainKeys Identified Mail (DKIM) adds digital signatures to outgoing emails, allowing recipients to verify messages weren't altered and came from authorised senders. Sending servers sign messages with private keys; receiving servers verify using public keys published in DNS. Unlike SPF (which checks IP addresses), DKIM survives email forwarding because the signature travels with the message. DKIM combined with SPF and DMARC provides robust email authentication.
Why It Matters
The DSC Perspective:
DKIM proves email authenticity and integrity. It's essential alongside SPF for email authentication. Most email platforms support DKIM—ensure it's configured for your domain.