DomainKeys Identified Mail, or DKIM, is a method for confirming the genuineness of an email by using an e-signature. When DomainKeys Identified Mail is activated for a specific domain, a public key is published to the global DNS system and a private one is stored on the mail server. If a new email is sent, a signature is generated using the private key and when the message is received, the signature is verified by the incoming POP3/IMAP mail server using the public key. Thus, the recipient can easily recognize if the email is genuine or if the sender’s email address has been spoofed. A discrepancy will appear if the content of the email message has been edited in the meantime as well, so DomainKeys Identified Mail can also be used to ensure that the sent and the delivered email messages are identical and that nothing has been added or erased. This authentication system will increase your email safety, as you can validate the legitimacy of the important emails that you get and your associates can do the same with the messages that you send them. Based on the particular email provider’s policies, an email that fails the test may be removed or may appear in the recipient’s mailbox with a warning alert.