DKIM, which stands for DomainKeys Identified Mail, is a validation system, which stops email addresses from being forged and email content from being tampered with. This is achieved by adding a digital signature to every email message sent from an address under a given domain name. The signature is created based on a private encryption key that is available on the SMTP server and it can be verified using a public key, which is available in the global Domain Name System. Thus, any email with altered content or a spoofed sender can be recognized by email service providers. This approach will enhance your online safety tremendously and you will be sure that any e-mail sent from a business partner, a bank, and so on, is authentic. When you send email messages, the recipient will also be sure that you are indeed the one who has sent them. Any mail that appears to be fake may either be labeled as such or may never show up in the receiver’s mailbox, depending on how the given provider has chosen to deal with such email messages.