DKIM, which is an abbreviation for DomainKeys Identified Mail, is an authentication system, which stops email headers from being spoofed and email content from being manipulated. This is achieved by adding a digital signature to every email message sent from an address under a particular domain. The signature is created on the basis of a private key that’s available on the outgoing server and it can be verified by using a public key, which is available in the global DNS database. In this way, any email message with changed content or a spoofed sender can be spotted by mail service providers. This technology will heighten your online safety significantly and you’ll know for sure that any message sent from a business associate, a banking institution, and so on, is an authentic one. When you send messages, the receiver will also be sure that you are indeed the one who has sent them. Any email that turns out to be fraudulent may either be labeled as such or may never enter the recipient’s inbox, depending on how the given provider has chosen to treat such email messages.