I created a new role for the user to write.
How do I forbid the publication to a redactor?
I don't recall testing this particular workflow, though. It is also worth noting that workflows can be a pain to set up, and adding workflow to an existing site can be problematic because existing nodes will not have a workflow yet (some scripts to fix this are available if you poke around).
This question is tagged for Drupal 7, which presents a problem with this solution. Workflow and Module Grants don't have D7 versions yet. There are discussions about ports in the issues, but nothing has been released yet.
Check out the publish content module. It's available for d6 and d7.
I asked a related question. And here's the answer someone gave me
Just unchecked publish checkbox on content type setting page and hide this field with CSS if user has writer role or remove it programmatically on the same condition with hook_form_alter
Use the revisioning module to prevent writer's from publishing "revisions of existing content".