DKIM, which is an abbreviation for DomainKeys Identified Mail, is an email authentication system, which stops email headers from being forged and email content from being modified. This is achieved by adding an e-signature to each and every email sent from an email address under a particular domain. The signature is published on the basis of a private key that is available on the SMTP email server and it can be validated with a public key, which is available in the global DNS database. In this way, any message with modified content or a spoofed sender can be recognized by email service providers. This approach will boost your online safety significantly and you’ll know for sure that any message sent from a business partner, a banking institution, etc., is genuine. When you send out emails, the recipient will also know for sure that you are indeed the one who has sent them. Any email message that turns out to be fraudulent may either be flagged as such or may never appear in the receiver’s mailbox, depending on how the particular provider has decided to cope with such emails.
