Triggered after an email notification is sent to a customer.
Event handler example:
public function subscribeEvents()
{
Backend::$events->addEvent('core:onAfterEmailSendToCustomer', $this, 'after_email_send_to_customer');
}
public function after_email_send_to_customer($customer, $subject, $message_text, $customer_email, $customer_name, $custom_data)
{
// Do something
}