sortir black list google

If you have determined that Google banned you for shady SEO (search engine optimization) practices, you have a lot more work to do. So much, in fact, that many people just ditch the former domain name and start with something new. It is much easier to build a site from a PR3 or PR4 (which most new sites are given) rather than trying to dig a banned site from the depths of PR0.
But Google will consider reincluding sites if you send an email to webmaster@google.com with "reinclusion request" as the subject - AFTER you have cleaned the entire site up. Do not email before your site is completely clean of spam techniques - if they see your site still doing the things it was banned for, you might hurt your chances to get your site included into the index again once it is clean.