DomainKeys Identified Mail, or DKIM, is a method for confirming the genuineness of an email message using a digital signature. When DKIM is enabled for a given domain name, a public 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 incoming POP3/IMAP mail server using the public key. In this way, the recipient can easily know if the email is authentic or if the sender’s email address has been forged. A mismatch will occur if the content of the email message has been edited on its way as well, so DomainKeys Identified Mail can also be used to ensure that the sent and the delivered emails are identical and that nothing has been attached or deleted. This authentication system will heighten your email safety, since you can validate the genuineness of the important email messages that you get and your partners can do the same with the messages that you send them. Depending on the particular email service provider’s policies, a message that fails to pass the examination may be erased or may enter the recipient’s mailbox with a warning alert.