DKIM, which is an acronym for DomainKeys Identified Mail, is a validation system, which hinders email headers from being forged and email content from being manipulated. This is done by adding an e-signature to each and every email sent from an address under a specific domain name. The signature is generated based on a private encryption key that’s available on the outbound 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 modified content or a forged sender can be identified by email service providers. This technology will heighten your online security substantially and you’ll know for sure that any e-mail message sent from a business partner, a bank, etc., is genuine. When you send email messages, the recipient will also know for sure that you are indeed the one who has sent them. Any mail that appears to be phony may either be labeled as such or may never appear in the recipient’s inbox, depending on how the given provider has decided to deal with such messages.