DomainKeys Identified Mail, or DKIM, is a method for checking the genuineness of an email message by using an e-signature. When DKIM is activated for a given domain name, a public cryptographic key is published to the global DNS database and a private one is stored on the email server. When a new message is sent, a signature is issued using the private key and when the email message is delivered, the signature is ‘scanned’ by the incoming server using the public key. Thus, the recipient can easily tell if the email message is legitimate or if the sender’s address has been spoofed. A discrepancy will appear if the content of the email has been modified on its way as well, so DKIM can also be used to make sure that the sent and the received email messages are identical and that nothing has been attached or deleted. This authentication system will enhance your email safety, since you can verify the legitimacy of the important emails that you get and your partners can do the same with the email messages that you send them. Based on the given email service provider’s adopted policies, an email that fails to pass the examination may be removed or may be delivered to the receiver’s mailbox with a warning alert.