What does it do?
The customer has just walked out the door. Two hours after the appointment they get a thank-you email from your business, with a Book a new appointment button that lets them book again in one click. The email goes out in the customer's language.
This is included in Groei and up. The module is called Post-appointment automation and you switch it on under Administration > Modules.
Where do I set it up?

Go to Administration > Email & messages and open the Thank-you message tab.
Under Per-service settings you switch the thank-you message on or off per service. That way you can send it after a colour treatment, for example, but not after a quick cut. A new service is switched on by default.
When is the message sent?
Only for an appointment with the status Completed, 2 hours after the end time. If you complete the appointment later, the email goes out straight after you complete it.
An appointment that stays on Confirmed gets no thank-you email. If you never click complete yourself, switch on Auto-complete under Administration > General. Stippa then completes the appointment by itself, a number of hours after it has ended. Read more in appointment statuses.
Through which channel?
The thank-you message goes by email, from the sender address you set under Administration > Email & messages, on the Email tab.
Can a customer unsubscribe?
Yes. Every thank-you email contains an unsubscribe link. A customer who unsubscribes no longer gets any automatic messages from your business.