DKIM, which is an acronym for DomainKeys Identified Mail, is an email validation system, which prevents email headers from being forged and email content from being tampered with. This is achieved by attaching an e-signature to each email message sent from an email address under a given domain. The signature is generated based on a private cryptographic key that’s available on the outgoing email server and it can be verified with 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 recognized by email providers. This technology will heighten your web security dramatically and you will be sure that any email message sent from a business partner, a banking institution, etc., is a genuine one. When you send emails, the receiver will also know for sure that you are indeed the one who has sent them. Any email message that turns out to be fraudulent may either be tagged as such or may never show up in the recipient’s mailbox, depending on how the particular provider has decided to handle such emails.