DKIM, which stands for DomainKeys Identified Mail, is an authentication system, which impedes email addresses from being spoofed and email content from being manipulated. This is done by attaching an electronic signature to every message sent from an address under a specific domain. The signature is generated on the basis of a private key that’s available on the outbound mail server and it can be verified by using a public key, which is available in the global Domain Name System. Thus, any message with altered content or a forged sender can be spotted by email providers. This approach will boost your web security greatly and you will know for sure that any e-mail sent from a business collaborator, a banking institution, and so on, 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 email that appears to be fraudulent may either be tagged as such or may never be delivered to the recipient’s inbox, based on how the particular provider has chosen to handle such email messages.