DKIM, which is an abbreviation for DomainKeys Identified Mail, is an email validation system, which prevents email headers from being spoofed and email content from being tampered with. This is done by attaching a digital signature to each message sent from an address under a given domain. The signature is published on the basis of a private cryptographic key that’s available on the sending 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 changed content or a spoofed sender can be spotted by email service providers. This technology will strengthen your worldwide web security markedly and you will know for sure that any e-mail sent from a business partner, a banking institution, and so on, is authentic. When you send out email messages, the recipient will also be sure that you are indeed the one who has sent them. Any mail that turns out to be phony may either be tagged as such or may never show up in the recipient’s inbox, depending on how the given provider has decided to treat such emails.