DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which stops email addresses from being spoofed and email content from being meddled with. This is achieved by adding a digital signature to each and every email message sent from an address under a particular domain. The signature is created on the basis of a private key that’s available on the outgoing SMTP server and it can be verified using a public key, which is available in the global Domain Name System. In this way, any email message with modified content or a spoofed sender can be identified by email providers. This method will strengthen your online safety substantially and you will know for sure that any email message sent from a business collaborator, a banking institution, etc., is a genuine one. When you send email messages, the recipient will also be sure that you are indeed the one who has sent them. Any email that appears to be fake may either be flagged as such or may never reach the receiver’s inbox, depending on how the particular provider has decided to cope with such email messages.