DKIM, which stands for DomainKeys Identified Mail, is an email validation system, which stops email addresses from being forged and email content from being modified. This is done by adding an electronic signature to every email sent from an email address under a certain domain. The signature is generated on the basis of a private encryption key that’s available on the outbound mail server and it can be verified using a public key, which is available in the global Domain Name System. Thus, any message with edited content or a forged sender can be spotted by mail service providers. This technology will increase your web security significantly and you’ll be sure that any email sent from a business ally, a banking institution, 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 mail that appears to be fraudulent may either be flagged as such or may never show up in the recipient’s mailbox, depending on how the particular provider has chosen to cope with such emails.