DKIM, which is short for DomainKeys Identified Mail, is an email validation system, which hinders email addresses from being forged and email content from being modified. This is done by attaching a digital signature to each email message sent from an address under a specific domain name. The signature is created based on a private key that is available on the SMTP email server and it can be verified using a public key, which is available in the global DNS database. Thus, any message with edited content or a forged sender can be recognized by mail service providers. This approach will boost your online safety markedly and you’ll be sure that any message sent from a business partner, a banking institution, etc., is legitimate. When you send out messages, the receiver will also know for sure that you are indeed the one who has sent them. Any mail that appears to be bogus may either be labeled as such or may never show up in the receiver’s mailbox, depending on how the given provider has chosen to cope with such email messages.