DKIM, which stands for DomainKeys Identified Mail, is a validation system, which impedes email headers from being forged and email content from being modified. This is done by attaching an electronic signature to each and every message sent from an email address under a specific domain name. The signature is generated on the basis of a private key that’s available on the SMTP server and it can be verified by using a public key, which is available in the global DNS database. Thus, any email with edited content or a forged sender can be spotted by email service providers. This technology will boost your online safety markedly and you will know for sure that any e-mail sent from a business associate, a bank, etc., is a legitimate one. When you send emails, the receiver will also know for sure that you are indeed the one who has sent them. Any email message that appears to be fraudulent may either be flagged as such or may never end up in the receiver’s mailbox, based on how the particular provider has decided to handle such messages.