Basically, how does it work?

You’ll use SecureMyEmail™ like any other email app or client. The main difference is, you’ll have the option to cryptographically “sign” (to hinder phishing and impersonators) and encrypt your email and attachments to and from anyone. You can use SecureMyEmail as your primary email software, or simply switch to it when you need to make sure an email, and its attachments, are protected.