Choose Create, Start from scratch, then Email (Static) or Email (Dynamic). Enter the recipient Email, Subject, and Message. Continue through Design and Download, and test the result on a device with an email application configured.
The QR code prepares an email action; it does not establish that a message has been sent or delivered. The visitor should review the recipient and message in their email app.
A static code embeds the details, so old printed copies do not update when you change them. The dynamic variant uses a hosted link. Pick the variant before printing and test the exact final code.
