DKIM, which stands for DomainKeys Identified Mail, is an email validation system, which stops email headers from being forged and email content from being modified. This is done by adding an e-signature to each and every email message sent from an address under a given domain. The signature is created on the basis of a private cryptographic key that’s available on the SMTP server and it can be verified using a public key, which is available in the global DNS database. In this way, any email message with modified content or a forged sender can be spotted by mail service providers. This method will enhance your online safety noticeably and you’ll be sure that any e-mail message sent from a business associate, a banking institution, etc., is authentic. When you send email messages, the receiver will also know for sure that you are indeed the one who has sent them. Any mail that appears to be phony may either be flagged as such or may never end up in the receiver’s inbox, depending on how the particular provider has decided to treat such email messages.
