DKIM, which is an acronym for DomainKeys Identified Mail, is an email authentication system, which stops email headers from being forged and email content from being manipulated. This is achieved by attaching an e-signature to every email sent from an email address under a given domain. The signature is published based on a private cryptographic key that’s available on the outbound SMTP server and it can be validated by using a public key, which is available in the global DNS database. Thus, any email with changed content or a spoofed sender can be recognized by email providers. This method will increase your worldwide web safety immensely and you will be sure that any email sent from a business associate, a bank, etc., is an authentic one. When you send out emails, the receiver will also know for sure that you are indeed the one who has sent them. Any email that appears to be phony may either be tagged as such or may never appear in the recipient’s mailbox, depending on how the particular provider has chosen to handle such emails.
