DKIM, which is an acronym for DomainKeys Identified Mail, is a validation system, which stops email addresses from being forged and email content from being modified. This is achieved by adding an electronic signature to each and every email sent from an email address under a specific domain. The signature is created on the basis of a private key that is available on the outbound SMTP server and it can be verified using a public key, which is available in the global Domain Name System. Thus, any message with changed content or a spoofed sender can be recognized by email service providers. This method will boost your online safety substantially and you will know for sure that any e-mail message sent from a business ally, a bank, and so on, is an authentic one. When you send out messages, the receiver will also know for sure that you are indeed the one who has sent them. Any email that appears to be forged may either be labeled as such or may never enter the receiver’s inbox, based on how the given provider has chosen to treat such messages.