DKIM, which is an abbreviation for DomainKeys Identified Mail, is an email authentication system, which blocks email headers from being spoofed and email content from being meddled with. This is achieved by attaching an electronic signature to every email sent from an email address under a particular domain name. The signature is generated based on a private cryptographic key that’s available on the SMTP email server and it can be validated using a public key, which is available in the global DNS database. In this way, any message with edited content or a spoofed sender can be identified by email service providers. This technology will boost your worldwide web safety enormously and you’ll know for sure that any message sent from a business ally, a bank, etc., is a genuine one. When you send out messages, the recipient will also be sure that you are indeed the one who has sent them. Any email that turns out to be fraudulent may either be marked as such or may never enter the recipient’s inbox, depending on how the particular provider has chosen to handle such email messages.