I don't want to show up the email recipients in the source code using this :

    <input type="hidden" name="toEmail" value="{{ '[email protected],[email protected]'|hash }}">

I want to manage multiple emails dynamically from the contactform.php config file in my craft/config folder. 

    <?php
    
    return array(
    	'toEmail' => (hash('[email protected], [email protected]') ?: null),
    );

This config file is not working and don't override the plugin settings in the CP. What would be the best way to achieve this ?