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, a public cryptographic key is published to the global DNS database 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 validated by the receiving server using the public key. In this way, the receiver can easily distinguish if the message is legitimate or if the sender’s email address has been spoofed. A mismatch will occur if the content of the email message has been edited on its way 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 attached or erased. This validation system will heighten your email safety, since you can verify the authenticity of the important email messages that you get and your colleagues can do the exact same thing with the messages that you send them. Based on the particular email provider’s adopted policies, a message that fails to pass the examination may be deleted or may reach the recipient’s inbox with a warning.
