DomainKeys Identified Mail, or DKIM, is a method for verifying the genuineness of an email message by using a digital signature. When DomainKeys Identified Mail is enabled for a particular domain name, a public cryptographic key is published to the global DNS system and a private one is stored on the mail server. If a new message is sent, a signature is generated using the private key and when the message is delivered, that signature is authenticated by the POP3/IMAP email server using the public key. In this way, the receiver can easily tell if the email message is authentic or if the sender’s email address has been forged. A discrepancy will appear if the content of the email message has been altered on its way 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 attached or removed. This email authentication system will strengthen your email safety, since you can confirm the authenticity of the important emails that you receive and your associates can do the exact same thing with the emails that you send them. Depending on the particular email provider’s adopted policies, a message that fails the test may be erased or may appear in the recipient’s inbox with a warning.