DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which stops email headers from being spoofed and email content from being manipulated. This is achieved by attaching an electronic signature to every email message sent from an address under a specific domain. The signature is published on the basis of a private encryption key that is available on the outgoing mail server and it can be verified using a public key, which is available in the global DNS database. In this way, any email message with altered content or a forged sender can be identified by mail service providers. This method will heighten your online security greatly and you’ll be sure that any e-mail sent from a business associate, a banking institution, and so on, is legitimate. When you send emails, the recipient will also be sure that you are indeed the one who has sent them. Any email that appears to be phony may either be marked as such or may never appear in the receiver’s inbox, depending on how the given provider has decided to deal with such emails.