DomainKeys Identified Mail, or DKIM, is a method for checking the genuineness of an email using an electronic signature. When DKIM is enabled for a specific domain name, a public cryptographic key is published to the global DNS database and a private one is stored on the mail server. When a new email is sent, a signature is generated using the private key and when the message is received, that signature is ‘scanned’ by the POP3/IMAP mail server using the public key. In this way, the recipient can easily discern if the email message is legitimate or if the sender’s address has been forged. A discrepancy will appear if the content of the email has been changed in the meantime as well, so DomainKeys Identified Mail can also be used to make sure that the sent and the delivered email messages are identical and that nothing has been added or erased. This email validation system will heighten your email safety, since you can verify the authenticity of the important emails that you get and your colleagues can do the same with the email messages that you send them. Depending on the given email service provider’s adopted policies, an email that fails the examination may be erased or may enter the receiver’s inbox with a warning sign.