DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which blocks email addresses from being spoofed and email content from being tampered with. This is achieved by attaching an e-signature to every email message sent from an address under a specific domain. The signature is generated on the basis of a private cryptographic key that’s available on the outgoing server and it can be verified using a public key, which is available in the global DNS database. Thus, any email message with changed content or a spoofed sender can be recognized by email providers. This method will enhance your web security considerably and you’ll be sure that any email sent from a business associate, a bank, and so on, is an authentic one. When you send out email messages, the recipient will also be sure that you are indeed the one who has sent them. Any email that appears to be fraudulent may either be tagged as such or may never reach the recipient’s mailbox, based on how the particular provider has chosen to treat such emails.