DKIM, which stands for DomainKeys Identified Mail, is an email validation system, which blocks email addresses from being forged and email content from being meddled with. This is achieved by adding a digital signature to each and every email message sent from an address under a specific domain. The signature is published on the basis of a private encryption key that’s available on the SMTP server and it can be verified with a public key, which is available in the global DNS database. In this way, any email with altered content or a spoofed sender can be spotted by email providers. This method will strengthen your online safety greatly and you’ll be sure that any e-mail message sent from a business ally, a banking institution, and so on, is genuine. When you send out messages, the receiver will also be sure that you are indeed the one who has sent them. Any email that turns out to be phony may either be marked as such or may never be delivered to the receiver’s inbox, depending on how the given provider has decided to treat such email messages.