DKIM, which is an acronym for DomainKeys Identified Mail, is a validation system, which impedes email headers from being forged and email content from being tampered with. This is done by adding an electronic signature to each email sent from an email address under a certain domain. The signature is generated based on a private cryptographic key that’s available on the SMTP server and it can be verified by using a public key, which is available in the global Domain Name System. Thus, any email with modified content or a forged sender can be identified by email providers. This method will boost your worldwide web security markedly and you’ll know for sure that any email message sent from a business partner, a bank, and so on, is genuine. When you send out emails, the receiver will also be sure that you are indeed the one who has sent them. Any email that turns out to be counterfeit may either be labeled as such or may never reach the receiver’s inbox, based on how the particular provider has decided to treat such email messages.