DKIM, which is short for DomainKeys Identified Mail, is an email validation system, which prevents email addresses from being spoofed and email content from being manipulated. This is achieved by adding a digital signature to each and every email message sent from an address under a given domain name. The signature is published based on a private encryption key that is available on the outgoing SMTP server and it can be verified using a public key, which is available in the global Domain Name System. Thus, any email with edited content or a spoofed sender can be recognized by mail service providers. This approach will increase your worldwide web security dramatically and you will know for sure that any e-mail sent from a business ally, a bank, and so on, is a legitimate one. When you send out emails, the recipient will also be sure that you are indeed the one who has sent them. Any email message that appears to be forged may either be flagged as such or may never show up in the receiver’s inbox, depending on how the particular provider has chosen to handle such emails.