DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which obstructs email addresses from being forged and email content from being modified. This is achieved by adding an electronic signature to each email sent from an address under a given domain name. The signature is issued based on a private encryption key that is available on the outgoing SMTP mail server and it can be validated with a public key, which is available in the global DNS database. Thus, any email with altered content or a forged sender can be spotted by mail service providers. This method will increase your worldwide web safety dramatically and you’ll be sure that any e-mail sent from a business collaborator, a banking institution, and so on, is a legitimate one. When you send emails, the receiver will also be sure that you are indeed the one who has sent them. Any email that turns out to be phony may either be labeled as such or may never enter the recipient’s mailbox, depending on how the given provider has chosen to deal with such messages.