DKIM, which is an acronym for DomainKeys Identified Mail, is an email validation system, which hinders email headers from being spoofed and email content from being meddled with. This is done by adding an electronic signature to every email message sent from an address under a certain domain. The signature is issued on the basis of a private key that’s available on the SMTP server and it can be verified with a public key, which is available in the global Domain Name System. In this way, any email message with altered content or a forged sender can be identified by email providers. This technology will strengthen your web safety considerably and you’ll be sure that any e-mail message sent from a business collaborator, a bank, etc., is legitimate. When you send emails, the receiver will also know for sure that you are indeed the one who has sent them. Any mail that turns out to be phony may either be marked as such or may never show up in the recipient’s mailbox, based on how the particular provider has decided to treat such emails.