DKIM, which stands for DomainKeys Identified Mail, is an authentication system, which prevents email addresses from being forged and email content from being tampered with. This is done by adding an electronic signature to each and every email sent from an email address under a particular domain name. The signature is published on the basis of a private encryption key that’s available on the outgoing mail server and it can be validated by using a public key, which is available in the global DNS database. In this way, any message with modified content or a spoofed sender can be identified by email providers. This approach will boost your online safety noticeably and you’ll be sure that any message sent from a business collaborator, a banking institution, and so on, is an authentic one. When you send out emails, the receiver will also know for sure that you are indeed the one who has sent them. Any email message that appears to be phony may either be flagged as such or may never show up in the receiver’s inbox, based on how the given provider has chosen to deal with such messages.