DKIM, which is an acronym for DomainKeys Identified Mail, is a validation system, which impedes email addresses from being spoofed and email content from being meddled with. This is achieved by adding a digital signature to each and every message sent from an address under a particular domain. The signature is created on the basis of a private encryption key that’s available on the outgoing mail server and it can be verified by using a public key, which is available in the global Domain Name System. In this way, any message with modified content or a forged sender can be spotted by email service providers. This approach will boost your online safety considerably and you’ll know for sure that any email sent from a business ally, a banking institution, etc., is a legitimate one. When you send out messages, the receiver will also be sure that you are indeed the one who has sent them. Any mail that appears to be forged may either be flagged as such or may never end up in the recipient’s mailbox, depending on how the given provider has chosen to treat such emails.