DKIM, which is an abbreviation for DomainKeys Identified Mail, is an authentication system, which blocks email headers from being forged and email content from being modified. This is achieved by attaching an e-signature to each and every email sent from an address under a particular domain. The signature is published based on a private encryption 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. Thus, any message with edited content or a spoofed sender can be identified by mail service providers. This technology will enhance your online security tremendously and you will know for sure that any email message sent from a business collaborator, a banking institution, and so on, is authentic. When you send out messages, the receiver will also be sure that you are indeed the one who has sent them. Any email message that appears to be phony may either be marked as such or may never show up in the receiver’s mailbox, based on how the particular provider has chosen to cope with such emails.