DKIM, which stands for DomainKeys Identified Mail, is an email authentication system, which obstructs email addresses from being spoofed and email content from being modified. This is achieved by attaching an e-signature to each and every message sent from an address under a certain domain. The signature is generated on the basis of a private key that is available on the outbound SMTP mail server and it can be verified by using a public key, which is available in the global Domain Name System. In this way, any message with altered content or a forged sender can be spotted by mail service providers. This technology will strengthen your web safety dramatically and you will know for sure that any message sent from a business associate, a bank, etc., is legitimate. 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 appears to be bogus may either be marked as such or may never appear in the recipient’s inbox, based on how the given provider has chosen to handle such email messages.