DomainKeys Identified Mail, or DKIM, is a method for checking the genuineness of an email message using a digital signature. When DomainKeys Identified Mail is enabled for a specific domain name, a public key is published to the global DNS database and a private one is stored on the email server. If a new email message is sent, a signature is issued using the private key and when the message is delivered, the signature is verified by the incoming POP3/IMAP mail server using the public key. Thus, the recipient can easily know if the email is legitimate or if the sender’s email address has been forged. A discrepancy will appear if the content of the email has been edited 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 attached or deleted. This email validation system will heighten your email safety, as you can confirm the authenticity of the important emails that you get and your partners can do likewise with the email messages that you send them. Depending on the given email service provider’s adopted policy, an email that fails the test may be deleted or may emerge in the receiver’s mailbox with a warning flag.