Sending multiple email

[ced (Cédric Krier)]

@osloar

I have thought of automating the process that when validating is sent automatically

You can do that with notification_email.

@osloar

but the client later wants to claim debts from all the sales

This is the job of account_dunning module.

@osloar

send them all at once to all the clients

This will be doable with notification_email if Re-send email notification is implemented.