DKIM, which is an abbreviation for DomainKeys Identified Mail, is a validation system, which prevents email addresses from being forged and email content from being manipulated. This is achieved by attaching an e-signature to every email message sent from an address under a specific domain name. The signature is published based on a private key that is available on the outbound SMTP mail server and it can be validated by 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 spotted by email service providers. This method will strengthen your web security significantly and you will be sure that any message sent from a business associate, a banking institution, and so on, is legitimate. When you send out messages, the recipient will also be sure that you are indeed the one who has sent them. Any email message that turns out to be bogus may either be flagged as such or may never enter the receiver’s inbox, based on how the given provider has decided to treat such email messages.