DKIM, which is short for DomainKeys Identified Mail, is an authentication system, which stops email addresses from being forged and email content from being modified. This is done by adding a digital signature to each message sent from an email address under a specific domain name. The signature is generated on the basis of a private encryption key that’s available on the SMTP email server and it can be validated by using a public key, which is available in the global DNS database. In this way, any email message with changed content or a spoofed sender can be identified by email providers. This technology will increase your worldwide web safety enormously and you will be sure that any e-mail message sent from a business collaborator, a banking institution, and so on, is authentic. When you send out emails, the recipient will also know for sure that you are indeed the one who has sent them. Any email message that turns out to be fraudulent may either be flagged as such or may never enter the recipient’s inbox, based on how the particular provider has chosen to treat such emails.