DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which hinders email headers from being forged and email content from being tampered with. This is done by adding an electronic signature to each email sent from an address under a specific domain. The signature is published based on a private cryptographic key that’s available on the SMTP email server and it can be validated with a public key, which is available in the global DNS database. Thus, any email with altered content or a spoofed sender can be spotted by mail service providers. This approach will increase your worldwide web safety noticeably and you will be sure that any e-mail message sent from a business associate, a banking institution, and so on, is legitimate. When you send email messages, the recipient will also know for sure that you are indeed the one who has sent them. Any mail that appears to be fake may either be labeled as such or may never enter the receiver’s mailbox, based on how the given provider has chosen to treat such emails.