[mariosipad]

To make COPS able to send e-mails you have to edit or insert some lines in config_local.php:

    /*
     * Enable and configure Send To Kindle (or Email) feature.
     *
     * Don't forget to authorize the sender email you configured in your Kindle's  Approved Personal Document E-mail List.
     *
     * If you want to use a simple smtp server (provided by your ISP for example), you can configure it like that :
     * $config['cops_mail_configuration'] = array( "smtp.host"     => "smtp.free.fr",
     *                                           "smtp.username" => "",
     *                                           "smtp.password" => "",
     *                                           "smtp.secure"   => "",
     *                                           "address.from"  => "cops@slucas.fr"
     *                                           );
     *
     * For Gmail (ssl is mandatory) :
     * $config['cops_mail_configuration'] = array( "smtp.host"     => "smtp.gmail.com",
     *                                           "smtp.username" => "YOUR GMAIL ADRESS",
     *                                           "smtp.password" => "YOUR GMAIL PASSWORD",
     *                                           "smtp.secure"   => "ssl",
     *                                           "address.from"  => "cops@slucas.fr"
     *                                           );
     */
    $config['cops_mail_configuration'] = NULL;

So change NULL to one of the examples filled in with your info.

Success!!