Leave blank to use one-tap mode above. Paste your Netlify Function URL here to send texts fully automatically, no tap. Setup steps come with the function file.
Lets the Send to customer button on a delivery email the proof image (packing slip + signature + photo) automatically, addressed to the customer. Setup steps come with send-email.js.
Note: a website can't text on its own — that's why automatic mode needs the small gateway. One-tap mode works everywhere with no setup.