DKIM, which is an acronym for DomainKeys Identified Mail, is an authentication system, which blocks email addresses from being spoofed and email content from being meddled with. This is done by adding an e-signature to each email sent from an address under a specific domain. The signature is issued based on a private encryption key that’s available on the sending server and it can be verified with a public key, which is available in the global DNS database. Thus, any email message with edited content or a forged sender can be spotted by email service providers. This method will strengthen your web safety markedly and you will know for sure that any e-mail sent from a business associate, a banking institution, and so on, is authentic. When you send messages, the recipient will also know for sure that you are indeed the one who has sent them. Any email message that appears to be fraudulent may either be tagged as such or may never end up in the receiver’s inbox, depending on how the particular provider has decided to cope with such email messages.