DKIM, which stands for DomainKeys Identified Mail, is a validation system, which obstructs email addresses from being spoofed and email content from being manipulated. This is done by adding an e-signature to every email sent from an email address under a given domain name. The signature is issued based on a private key that is available on the SMTP mail server and it can be validated with a public key, which is available in the global Domain Name System. Thus, any message with modified content or a spoofed sender can be spotted by mail service providers. This method will heighten your web security considerably and you’ll know for sure that any e-mail message sent from a business associate, a bank, and so on, is an authentic one. When you send emails, the recipient will also be sure that you are indeed the one who has sent them. Any email message that turns out to be fake may either be marked as such or may never appear in the recipient’s mailbox, based on how the particular provider has chosen to cope with such email messages.