DomainKeys Identified Mail

DomainKeys Identified Mail, or DKIM, is a method for verifying the legitimacy of an email by using a digital signature. When DKIM is activated for a particular domain, a public cryptographic key is published to the global DNS system and a private one is kept on the email server. If a new email message is sent, a signature is issued using the private key and when the email is delivered, the signature is verified by the incoming mail server using the public key. In this way, the receiver can easily discern if the email message is authentic or if the sender’s email address has been spoofed. A discrepancy will appear if the content of the email message has been altered on its way as well, so DKIM can also be used to make sure that the sent and the received emails are identical and that nothing has been added or deleted. This authentication system will heighten your email security, as you can confirm the authenticity of the important emails that you receive and your partners can do the same with the messages that you send them. Depending on the given email service provider’s adopted policy, an email message that fails the examination may be deleted or may end up in the receiver’s mailbox with a warning notification.