DKIM, which is short for DomainKeys Identified Mail, is an email validation system, which hinders email headers from being forged and email content from being modified. This is done by attaching a digital signature to every email message sent from an address under a particular domain. The signature is published based on a private encryption key that is available on the outbound mail server and it can be verified using a public key, which is available in the global DNS database. Thus, any message with altered content or a spoofed sender can be recognized by email providers. This technology will heighten your worldwide web security tremendously and you’ll be sure that any message sent from a business partner, a bank, etc., is legitimate. 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 fraudulent may either be tagged as such or may never appear in the receiver’s mailbox, depending on how the given provider has decided to handle such messages.