DomainKeys Identified Mail

DomainKeys Identified Mail, or DKIM, is a system for checking the genuineness of an email using an electronic 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 mail server. If a new message is sent, a signature is generated using the private key and when the email is received, the signature is validated by the receiving server using the public key. Thus, the recipient can easily distinguish if the email message is authentic or if the sender’s email address has been forged. A mismatch will occur if the content of the email has been changed on its way as well, so DKIM can also be used to ensure that the sent and the delivered email messages are identical and that nothing has been added or erased. This authentication system will heighten your email safety, since you can validate the genuineness of the important email messages that you get and your partners can do the exact same thing with the email messages that you send them. Depending on the particular email service provider’s policy, a message that fails the check may be removed or may emerge in the receiver’s inbox with a warning notification.