DomainKeys Identified Mail, or DKIM, is a method for verifying the genuineness of an email by using an e-signature. When DomainKeys Identified Mail is enabled for a specific domain, a public cryptographic key is published to the global Domain Name System and a private one is stored on the email server. If a new email message is sent, a signature is generated using the private key and when the message is received, that signature is authenticated by the POP3/IMAP email server using the public key. Thus, the recipient can easily know if the email is authentic or if the sender’s email address has been spoofed. A discrepancy will occur if the content of the email message has been edited in the meantime as well, so DKIM can also be used to ensure that the sent and the delivered messages are identical and that nothing has been added or removed. This authentication system will enhance your email security, since you can validate the authenticity of the important email messages that you get and your partners can do likewise with the emails that you send them. Based on the particular email service provider’s adopted policy, an email message that fails the examination may be erased or may emerge in the recipient’s inbox with a warning sign.