DKIM, which is an acronym for DomainKeys Identified Mail, is an email authentication system, which blocks email addresses from being spoofed and email content from being meddled with. This is achieved by attaching an electronic signature to each email message sent from an address under a particular domain. The signature is generated on the basis of a private key that’s available on the outbound email server and it can be verified with a public key, which is available in the global DNS database. Thus, any message with modified content or a forged sender can be identified by mail service providers. This technology will strengthen your worldwide web security substantially and you’ll be sure that any e-mail message sent from a business associate, a bank, and so on, is a genuine one. When you send out emails, the receiver will also be sure that you are indeed the one who has sent them. Any mail that turns out to be fake may either be marked as such or may never show up in the receiver’s mailbox, based on how the given provider has decided to treat such email messages.