DKIM, which is short for DomainKeys Identified Mail, is a validation system, which obstructs email headers from being spoofed and email content from being modified. This is achieved by adding an e-signature to each and every email sent from an address under a given domain name. The signature is created on the basis of a private cryptographic key that is available on the outgoing SMTP mail server and it can be verified with a public key, which is available in the global DNS database. Thus, any email message with altered content or a forged sender can be spotted by mail service providers. This method will enhance your worldwide web safety markedly and you will know for sure that any e-mail message sent from a business ally, a bank, etc., is legitimate. When you send out messages, the receiver will also be sure that you are indeed the one who has sent them. Any email that turns out to be fake may either be tagged as such or may never be delivered to the receiver’s mailbox, based on how the given provider has decided to cope with such messages.