DKIM, which is an acronym for DomainKeys Identified Mail, is an authentication system, which obstructs email headers from being spoofed and email content from being modified. This is achieved by adding an electronic signature to every message sent from an email address under a particular domain. The signature is generated on the basis of a private encryption key that is available on the outgoing SMTP email server and it can be verified with a public key, which is available in the global DNS database. In this way, any message with edited content or a forged sender can be recognized by mail service providers. This method will increase your worldwide web safety considerably and you will be sure that any e-mail message sent from a business associate, a bank, 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 message that turns out to be phony may either be flagged as such or may never show up in the recipient’s mailbox, based on how the particular provider has chosen to deal with such emails.