When someone scans an Email QR code, their phone intercepts the "mailto:" link. It instantly opens the mail app (like Apple Mail or Gmail) and drafts a new message. Because you generated the code, you get to dictate the recipient address, the exact subject line, and even the starting body text.

Customer feedback forms (pre-fill the subject to "Table 4 Feedback"), support channels, newsletter sign-ups, and sales inquiries. Make it as easy as possible for someone to reach out.