DKIM, which is short for DomainKeys Identified Mail, is a validation system, which obstructs email headers from being spoofed and email content from being tampered with. This is done by attaching an electronic signature to each and every email message sent from an address under a particular domain. The signature is created based on a private key that’s available on the outgoing SMTP email server and it can be verified by using a public key, which is available in the global DNS database. In this way, any email with edited content or a forged sender can be spotted by email service providers. This approach will heighten your worldwide web safety immensely and you will know for sure that any email sent from a business collaborator, a banking institution, etc., is a genuine one. When you send messages, the receiver will also be sure that you are indeed the one who has sent them. Any email message that appears to be fake may either be marked as such or may never be delivered to the recipient’s inbox, based on how the particular provider has chosen to cope with such email messages.