DomainKeys Identified Mail, or DKIM, is a method for confirming the legitimacy of an email using an e-signature. When DomainKeys Identified Mail is enabled for a particular domain name, a public cryptographic key is published to the global DNS database and a private one is kept on the email server. When a new message is sent, a signature is generated using the private key and when the email is received, that signature is checked by the incoming POP3/IMAP mail server using the public key. In this way, the recipient can easily distinguish if the email is genuine or if the sender’s address has been spoofed. A mismatch will occur if the content of the email has been altered in the meantime as well, so DKIM can also be used to make sure that the sent and the received emails are identical and that nothing has been attached or erased. This email validation system will heighten your email security, since you can confirm the genuineness of the important email messages that you get and your associates can do the exact same thing with the email messages that you send them. Based on the given email service provider’s adopted policies, an email message that fails the check may be erased or may emerge in the recipient’s inbox with a warning alert.