In 'Settings/Users/Access Management', enable the right: 'Authorize to send the receipt/invoice by email'.

To send a valid receipt by email, the sale must be closed.
To send an invoice by email, the sale must be linked to a customer AND an invoice address.

In the Payment section of a sale, click on the 'Email' button to send the receipt by email.
The PDF A4 document will be sent. You can setup the content in 'Settings/Printing/Invoice PDF A4'. More information.

To configure the email message, go to 'Settings/Printing/Email'.

You can use the following codes to customize the email:

Code	Description
__hibou_print_client_first_name__	Customer first name
__hibou_print_client_last_name__	Customer last name
__hibou_print_company__	Company name
__hibou_print_num_order__	Invoice number
__hibou_print_num_order_interne__	Sale number
__hibou_print_ref_order__	Sale reference
__hibou_print_date__	Sale date
__hibou_print_day__	Day of the sale
__hibou_print_month__	Month of the sale
__hibou_print_month_letters__	Month in letters of the sale
__hibou_print_year__	Year of the sale
__hibou_print_order_points__	Loyalty points gained on the sale
__hibou_print_client_points__	Balance of the customer loyalty account
__hibou_print_tracking_number__	Tracking number
__hibou_print_payment_stripe__	Link for online payment (with Stripe)
__hibou_print_myreceipt_link__	Link to the QR-code invoice

---

You can select the user email address who will receive replies in the 'Sender' field (if none, replies will be sent to the user email address linked to the sale).
You can also select the use who will receive a copy of the message.