DomainKeys Identified Mail, or DKIM, is a system for confirming the authenticity of an email message using an e-signature. When DomainKeys Identified Mail is enabled for a specific domain name, a public key is published to the global DNS system and a private one is kept on the mail server. If a new email message is sent, a signature is issued using the private key and when the message is received, that signature is ‘scanned’ by the incoming POP3/IMAP mail server using the public key. Thus, the recipient can easily know if the email is legitimate or if the sender’s address has been forged. A mismatch will appear if the content of the email has been modified in the meantime as well, so DomainKeys Identified Mail can also be used to ensure that the sent and the delivered messages are identical and that nothing has been added or deleted. This email validation system will boost your email safety, as you can confirm the genuineness of the important emails that you get and your partners can do the exact same thing with the emails that you send them. Depending on the particular email provider’s adopted policy, an email message that fails to pass the examination may be removed or may show up in the recipient’s inbox with a warning sign.