/**
     * Marks a message as read
     *
     * @param mail the mail
     */
    public void markRead(Mail mail){
        int pid = mail.getPID();
        String uid = mail.getUID();
        ServerResponse response = post(Mode.MARK,
            new Variable("apikey", mail.getKey()),
            new Variable("read", String.valueOf(true)),
            new Variable("pid", String.valueOf(pid)),
            new Variable("uid", uid),
            new Variable("username", mail.getTo()));

        // Fire event
        plugin.getServer().getPluginManager().callEvent(new XMailMarkReadEvent(response, mail));
    }