DomainKeys Identified Mail, or DKIM, is a method for confirming the authenticity of an email message by using an electronic signature. When DomainKeys Identified Mail is activated for a given domain, a public key is published to the global DNS system and a private one is kept 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 delivered, that signature is validated by the POP3/IMAP mail server using the public key. In this way, the recipient can easily tell if the email message is legitimate or if the sender’s address has been spoofed. A discrepancy will appear if the content of the email message has been altered in the meantime as well, so DKIM can also be used to make sure that the sent and the delivered email messages are identical and that nothing has been added or deleted. This email validation system will heighten your email safety, as you can confirm the genuineness of the important emails that you receive and your associates can do the same with the messages that you send them. Depending on the particular mail service provider’s adopted policy, an email message that fails the examination may be erased or may end up in the recipient’s mailbox with a warning sign.