Protect yourself and your customers by authenticating the emails you send using these methods. Email security is often overlooked as an important element in this universal medium. In the business world, an email inbox is the basic form of communication between business owners, contractors, customers and other stakeholders. Unfortunately, in addition to important and substantive messages, a large amount of spam and promotional offers land in our inboxes every day. As a result, without established authentication protocols, your brand's communication is much easier to forge, exposing you and your customers to hacking and phishing attacks.