DKIM, which is short for DomainKeys Identified Mail, is an email authentication system, which impedes email headers from being spoofed and email content from being manipulated. This is done by attaching an e-signature to each email message sent from an email address under a specific domain name. The signature is published on the basis of a private cryptographic key that’s available on the outgoing mail server and it can be validated using a public key, which is available in the global Domain Name System. Thus, any email message with altered content or a spoofed sender can be recognized by email service providers. This method will heighten your web security greatly and you’ll know for sure that any e-mail message sent from a business partner, a bank, etc., is a genuine one. When you send out messages, the recipient will also be sure that you are indeed the one who has sent them. Any email message that appears to be phony may either be tagged as such or may never reach the receiver’s mailbox, based on how the particular provider has decided to cope with such messages.