Firefox Send might be an option. https://send.firefox.com/ https://send.firefox.com/ Let's you set link lifetime, number of clicks/downloads allowed, etc. It w

Firefox Send might be an option. https://send.firefox.com/ https://send.firefox.com/ Let's you set link lifetime, number of clicks/downloads allowed, etc. It wasn't around when I needed to send my passport scan the last time but it's more comfortable than email.