DKIM, which stands for DomainKeys Identified Mail, is a validation system, which prevents email addresses from being spoofed and email content from being tampered with. This is achieved by adding an electronic signature to every email sent from an email address under a specific domain. The signature is published based on a private key that’s available on the outgoing server and it can be verified by using a public key, which is available in the global Domain Name System. In this way, any email message with changed content or a forged sender can be recognized by email service providers. This method will strengthen your web safety substantially and you’ll be sure that any email message sent from a business partner, a bank, and so on, is a genuine one. When you send emails, the recipient will also know for sure that you are indeed the one who has sent them. Any mail that turns out to be counterfeit may either be flagged as such or may never be delivered to the receiver’s mailbox, depending on how the particular provider has decided to deal with such messages.