Cacher is the code snippet organizer for pro developers

<?php

/**
 * Send listing contact email to
 * multiple email addresses
 */

add_filter( 'wpsight_contact_form_email_data', 'custom_contact_form_email_data' );

function custom_contact_form_email_data( $data ) {
   
    $data['recipients'] = array( $data['recipients'], 'name@domain.com', 'name@domain.com' );
   
    return $data;
  
}