DKIM, which is an abbreviation for DomainKeys Identified Mail, is an authentication system, which impedes email addresses from being forged and email content from being meddled with. This is achieved by attaching a digital signature to each email sent from an email address under a particular domain name. The signature is published based on a private cryptographic key that is available on the SMTP server and it can be validated with 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 heighten your online safety enormously and you’ll be sure that any message sent from a business partner, a banking institution, etc., is an authentic one. When you send out emails, the recipient will also be sure that you are indeed the one who has sent them. Any email that turns out to be bogus may either be labeled as such or may never appear in the receiver’s mailbox, based on how the particular provider has chosen to deal with such emails.
