DKIM, which is an abbreviation for DomainKeys Identified Mail, is an email authentication system, which impedes email headers from being forged and email content from being manipulated. This is done by attaching a digital signature to each email sent from an email address under a particular domain name. The signature is published on the basis of a private encryption key that is available on the SMTP email server and it can be validated using a public key, which is available in the global DNS database. Thus, any email with edited content or a spoofed sender can be spotted by email service providers. This technology will strengthen your worldwide web safety tremendously and you will know for sure that any message sent from a business partner, a bank, and so on, is a genuine one. When you send out email messages, the receiver will also know for sure that you are indeed the one who has sent them. Any email that appears to be counterfeit may either be tagged as such or may never appear in the recipient’s inbox, based on how the given provider has chosen to handle such emails.