DKIM, which stands for DomainKeys Identified Mail, is an email authentication system, which hinders email headers from being spoofed and email content from being manipulated. This is achieved by attaching an electronic signature to each and every email message sent from an email address under a particular domain. The signature is issued based on a private encryption key that’s available on the outgoing SMTP mail server and it can be validated with a public key, which is available in the global Domain Name System. In this way, any email with modified content or a spoofed sender can be spotted by email providers. This approach will boost your worldwide web safety considerably and you will be sure that any email sent from a business ally, a bank, and so on, is an authentic one. When you send messages, the receiver will also be sure that you are indeed the one who has sent them. Any email message that appears to be counterfeit may either be marked as such or may never show up in the recipient’s mailbox, based on how the given provider has chosen to cope with such messages.