DKIM, which stands for DomainKeys Identified Mail, is an email authentication system, which impedes email headers from being spoofed and email content from being modified. This is achieved by attaching a digital signature to each and every email message sent from an address under a particular domain name. The signature is published 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. In this way, any email message with altered content or a spoofed sender can be spotted by email providers. This approach will heighten your worldwide web safety enormously and you’ll be sure that any email sent from a business associate, a banking institution, etc., is genuine. When you send email messages, the receiver will also know for sure that you are indeed the one who has sent them. Any email message that turns out to be fake may either be labeled as such or may never show up in the receiver’s mailbox, based on how the given provider has decided to treat such email messages.