DKIM, which is an acronym for DomainKeys Identified Mail, is an authentication system, which obstructs email headers from being forged and email content from being meddled with. This is achieved by adding an electronic signature to every email sent from an address under a certain domain name. The signature is created on the basis of a private encryption key that is available on the outgoing mail server and it can be verified with 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 identified by email providers. This approach will boost your web safety greatly and you’ll be sure that any email message sent from a business partner, a bank, etc., is genuine. When you send emails, the receiver will also know for sure that you are indeed the one who has sent them. Any email message that turns out to be forged may either be marked as such or may never appear in the recipient’s mailbox, based on how the given provider has chosen to cope with such messages.