Mailto: address with subject and body text. It merely uses a simple mailto: formatting shown in examples below. To encode an email to QR Code successfully, you will need an email address, email subject, as well as the body of your email. What information can be stored in an Email QR Code? This solution is also known as Email QR Code and is especially useful if you would like to make it easier for your audience or customers to contact you. Yes, you can! Using our QR Code Generator for email, you can easily write an entire email contained within a QR Code.