DomainKeys Identified Mail, or DKIM, is a method for checking the genuineness of an email message by using an e-signature. When DKIM is enabled for a particular domain, a public encryption key is published to the global DNS database and a private one is stored on the email server. When a new email message is sent, a signature is issued using the private key and when the email message is received, that signature is checked by the POP3/IMAP mail server using the public key. In this way, the recipient can easily discern if the email message is authentic or if the sender’s address has been spoofed. A discrepancy will appear if the content of the email message has been changed in the meantime as well, so DomainKeys Identified Mail can also be used to ensure that the sent and the delivered emails are identical and that nothing has been attached or removed. This validation system will enhance your email security, as you can verify the genuineness of the important email messages that you get and your associates can do likewise with the emails that you send them. Based on the particular email service provider’s policies, an email that fails the examination may be removed or may appear in the recipient’s mailbox with a warning symbol.