DomainKeys Identified Mail, or DKIM, is a method for confirming the authenticity of an email message using a digital signature. When DKIM is enabled for a particular domain name, a public key is published to the global DNS database 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 email is delivered, that signature is ‘scanned’ by the incoming POP3/IMAP mail server using the public key. In this way, the recipient can easily recognize if the message is genuine or if the sender’s address has been spoofed. A mismatch will occur if the content of the email has been altered in the meantime as well, so DKIM can also be used to make sure that the sent and the delivered email messages are identical and that nothing has been attached or removed. This email authentication system will increase your email safety, as you can verify the authenticity of the important emails that you receive and your partners can do likewise with the emails that you send them. Based on the given email provider’s policy, an email that fails to pass the examination may be erased or may show up in the receiver’s mailbox with a warning sign.