DomainKeys Identified Mail
DomainKeys Identified Mail (DKIM) is an email authentication method that allows the receiver to check that an email was indeed sent and authorized by the owner of the sending domain. It uses cryptographic signatures to verify that the message content has not been altered in transit. This helps prevent email spoofing and phishing attacks by ensuring the integrity of the sender's domain.
Developers should implement DKIM when building or managing email systems to enhance security and deliverability. It is crucial for applications that send transactional emails (e.g., password resets, notifications) or marketing campaigns to avoid being marked as spam. DKIM is often required alongside SPF and DMARC to establish a robust email authentication framework.