DKIM, which is short for DomainKeys Identified Mail, is an authentication system, which prevents email headers from being forged and email content from being tampered with. This is achieved by attaching an electronic signature to every email message sent from an address under a particular domain name. The signature is published based on a private key that’s available on the outbound mail server and it can be validated by using a public key, which is available in the global DNS database. In this way, any email with changed content or a spoofed sender can be spotted by email providers. This technology will enhance your worldwide web security substantially and you will know for sure that any message sent from a business collaborator, a bank, etc., 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 mail that turns out to be bogus may either be marked as such or may never show up in the receiver’s mailbox, based on how the given provider has chosen to handle such email messages.