Simple filter for Email contact form

Hey…

just wrote a simple filter for Email contact form, maybe someone else is interested in.

just add after $data = [...]; in /site/controllers/contact.php.

        // filter specific phrases
        $filter = [
        '@badmail.host', 'foo.bar', 'viagra'
        ];
        
        foreach($filter as $match) {
            if(preg_grep('/' . preg_quote($match, '/') . '/i', $data)){
                go($page->url());
                exit;
            }  
        }