DomainKeys Identified Mail, or DKIM, is a method for validating the genuineness of an email by using a digital signature. When DKIM is enabled for a given domain name, 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 email message is delivered, that signature is checked by the incoming server using the public key. In this way, the recipient can easily distinguish if the message is authentic or if the sender’s email address has been forged. A mismatch will appear 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 added or erased. This validation system will strengthen your email safety, as you can verify the legitimacy of the important emails that you get and your associates can do the exact same thing with the email messages that you send them. Depending on the particular mail service provider’s adopted policies, a message that fails the check may be removed or may appear in the receiver’s inbox with a warning symbol.