DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which obstructs email addresses from being forged and email content from being manipulated. This is achieved by attaching an electronic signature to each email sent from an email address under a particular domain. The signature is published based on a private cryptographic key that is available on the sending server and it can be validated using a public key, which is available in the global DNS database. In this way, any message with edited content or a spoofed sender can be recognized by mail service providers. This technology will enhance your online safety tremendously and you will be sure that any e-mail sent from a business associate, a banking institution, and so on, is a genuine one. When you send out email messages, 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 marked as such or may never enter the receiver’s mailbox, depending on how the given provider has chosen to cope with such emails.