transactional email
One-to-one messages like receipts and password resets that a system sends because something happened.
Like the receipt a cashier prints after a purchase. Transactional email is a one-to-one message a system sends because a specific event happened.
It handles sign up confirmations, password resets, receipts, and alerts that keep people informed and able to use the app. It is not a newsletter or marketing blast.
With Resend, you define a template, fill in details like name or order number, and send when an event occurs. Links often include a short-lived token so only the right person can act.