DKIM, which is short for DomainKeys Identified Mail, is a validation system, which impedes email addresses from being spoofed and email content from being manipulated. This is achieved by attaching an electronic signature to each message sent from an email address under a given domain name. The signature is created based on a private key that’s available on the outgoing SMTP server and it can be verified by using a public key, which is available in the global DNS database. In this way, any email with edited content or a forged sender can be identified by mail service providers. This technology will strengthen your worldwide web safety considerably and you’ll know for sure that any e-mail message sent from a business partner, a banking institution, etc., is an authentic one. When you send messages, the recipient will also be sure that you are indeed the one who has sent them. Any mail that appears to be fake may either be tagged as such or may never end up in the recipient’s mailbox, depending on how the particular provider has decided to treat such messages.