DKIM, which is an abbreviation for DomainKeys Identified Mail, is an email authentication system, which hinders email addresses from being spoofed and email content from being manipulated. This is achieved by adding an e-signature to each message sent from an email address under a particular domain. The signature is created based on a private cryptographic key that is available on the outgoing server and it can be validated with a public key, which is available in the global DNS database. In this way, any message with modified content or a forged sender can be spotted by email providers. This approach will enhance your worldwide web security greatly and you’ll know for sure that any e-mail sent from a business collaborator, a bank, etc., is authentic. When you send emails, the receiver will also know for sure that you are indeed the one who has sent them. Any mail that appears to be counterfeit may either be labeled as such or may never be delivered to the recipient’s inbox, depending on how the particular provider has decided to treat such messages.