DKIM, which is an acronym for DomainKeys Identified Mail, is an authentication system, which obstructs email addresses from being spoofed and email content from being manipulated. This is done by adding a digital signature to each message sent from an email address under a specific domain. The signature is generated on the basis of a private key that’s available on the SMTP email server and it can be validated with a public key, which is available in the global DNS database. In this way, any email message with changed content or a forged sender can be recognized by mail service providers. This technology will boost your worldwide web safety tremendously and you’ll be sure that any e-mail sent from a business partner, a bank, and so on, is a legitimate one. When you send out messages, the receiver will also be sure that you are indeed the one who has sent them. Any email that appears to be counterfeit may either be flagged as such or may never end up in the recipient’s mailbox, based on how the particular provider has decided to treat such messages.