DKIM, which is an acronym for DomainKeys Identified Mail, is an email validation system, which blocks email addresses from being spoofed and email content from being manipulated. This is achieved by adding an e-signature to each and every email message sent from an email address under a particular domain name. The signature is generated on the basis of a private key that’s available on the SMTP mail server and it can be validated with a public key, which is available in the global DNS database. In this way, any email with edited content or a spoofed sender can be recognized by mail service providers. This approach will increase your worldwide web security substantially and you will be sure that any e-mail sent from a business collaborator, a banking institution, and so on, is a genuine one. When you send out email messages, the recipient will also be sure that you are indeed the one who has sent them. Any email message that turns out to be counterfeit may either be labeled as such or may never enter the receiver’s mailbox, depending on how the particular provider has decided to deal with such messages.