DKIM, which stands for DomainKeys Identified Mail, is an email authentication method designed to help protect the integrity of messages and verify that they truly come from the claimed sender. It works by adding a digital signature to an email’s header, created using a private key held by the sending domain.
When the email is received, the recipient’s mail server checks this signature against the sender’s public key published in DNS records.
This process helps reduce email spoofing and phishing, making communications safer for everyone. If the signature matches, recipients can trust the message hasn’t been altered during transit and really originated from the claimed source.
DKIM is widely used alongside other email security tools like SPF (Sender Policy Framework) and DMARC (Domain-based Message Authentication, Reporting & Conformance) to build a stronger defense against email fraud.
Overall, DKIM makes the email world a bit more trustworthy—helping important messages reach their inbox without getting lost or marked as spam.
