DomainKeys Identified Mail

DomainKeys Identified Mail, or DKIM, is a method for validating the authenticity of an email message by using an e-signature. When DomainKeys Identified Mail is enabled for a particular domain, a public key is published to the global DNS system and a private one is kept on the email server. If a new email message is sent, a signature is issued using the private key and when the message is received, the signature is authenticated by the incoming email server using the public key. Thus, the receiver can easily tell if the email 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 in the meantime as well, so DKIM can also be used to make sure that the sent and the delivered emails are identical and that nothing has been attached or removed. This validation system will boost your email security, since you can validate 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, a message that fails the check may be deleted or may reach the receiver’s mailbox with a warning notification.