DomainKeys Identified Mail, or DKIM, is a method for validating the legitimacy of an email by using an electronic signature. When DKIM is activated for a specific domain, a public encryption key is published to the global DNS system and a private one is stored on the email server. When a new email message is sent, a signature is generated using the private key and when the message is delivered, the signature is validated by the receiving server using the public key. In this way, the recipient can easily discern if the email message is legitimate or if the sender’s email address has been forged. A discrepancy will occur if the content of the email message has been changed in the meantime as well, so DKIM can also be used to ensure that the sent and the delivered email messages are identical and that nothing has been added or removed. This email authentication system will boost your email safety, since you can verify the legitimacy of the important emails that you receive and your partners can do the exact same thing with the email messages that you send them. Depending on the given email service provider’s policy, an email message that fails the examination may be removed or may reach the recipient’s inbox with a warning notification.