DKIM, which is short for DomainKeys Identified Mail, is an email authentication system, which stops email addresses from being spoofed and email content from being modified. This is done by attaching an e-signature to each email sent from an email address under a given domain name. The signature is generated based on a private encryption key that’s available on the SMTP server and it can be validated using a public key, which is available in the global Domain Name System. In this way, any email with edited content or a spoofed sender can be identified by mail service providers. This technology will heighten your web safety markedly and you’ll know for sure that any email sent from a business partner, a bank, and so on, is authentic. When you send out email messages, the receiver will also be sure that you are indeed the one who has sent them. Any email message that appears to be fraudulent may either be flagged as such or may never show up in the recipient’s mailbox, depending on how the given provider has chosen to handle such email messages.