DKIM, which is an acronym for DomainKeys Identified Mail, is an authentication system, which hinders email addresses from being spoofed and email content from being tampered with. This is achieved by attaching an e-signature to each email sent from an email address under a particular domain. The signature is issued on the basis of a private encryption key that is available on the outbound SMTP email server and it can be validated by using a public key, which is available in the global DNS database. Thus, any message with modified content or a spoofed sender can be recognized by mail service providers. This technology will enhance your worldwide web safety dramatically and you’ll know for sure that any e-mail message sent from a business collaborator, a banking institution, etc., is a legitimate one. 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 forged may either be tagged as such or may never enter the recipient’s inbox, depending on how the particular provider has decided to deal with such messages.