DomainKeys Identified Mail, or DKIM, is a system for checking the genuineness of an email message using an e-signature. When DomainKeys Identified Mail is activated for a specific domain, a public encryption key is published to the global DNS database and a private one is stored on the mail server. If a new email message is sent, a signature is generated using the private key and when the email is delivered, the signature is authenticated by the POP3/IMAP email server using the public key. Thus, the recipient can easily distinguish if the email is legitimate or if the sender’s email address has been forged. A discrepancy will appear if the content of the email message has been modified on its way 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 deleted. This validation system will boost your email safety, since you can verify the authenticity of the important email messages that you receive and your associates can do the exact same thing with the email messages that you send them. Depending on the given mail service provider’s policy, an email that fails the check may be removed or may emerge in the recipient’s inbox with a warning sign.