diff --git a/addons/rating/controllers/main.py b/addons/rating/controllers/main.py
index f2ab1ddc2db..e89001d1751 100644
--- a/addons/rating/controllers/main.py
+++ b/addons/rating/controllers/main.py
@@ -14,7 +14,7 @@ class Rating(http.Controller):
         if rating:
             is_rated = bool(rating.rating != -1)
             if not is_rated:
-                request.env['rating.rating'].sudo().apply_rating(rate, token=token)
+                request.env['rating.rating'].apply_rating(rate, token=token)
             # redirect to the form view if logged person
             if request.session.uid and not is_rated:
                 record = request.env[rating.res_model].browse(rating.res_id)
diff --git a/addons/rating/models/rating.py b/addons/rating/models/rating.py
index 401df694a1c..dab705fc9fa 100644
--- a/addons/rating/models/rating.py
+++ b/addons/rating/models/rating.py
@@ -36,11 +36,12 @@ class Rating(models.Model):
     def apply_rating(self, rate, res_model=None, res_id=None, token=None):
         """ apply a rating for given res_model/res_id or token. If the res_model is a mail.thread
             object, a message will be posted in the chatter.
-            :param float rating : the rating value to apply
-            :param list res_id : id of the rated object.
-            :param string res_model : name of model.
-            :param string token : access token
-            :return the rating record
+            :param rate : the rating value to apply
+            :type rate : float
+            :param res_id : id of the rated object.
+            :param res_model : name of model.
+            :param token : access token
+            :returns rating.rating record
         """
         domain = [('access_token', '=', token)] if token else [('res_model', '=', res_model), ('res_id', '=', res_id)]
         rating = self.search(domain, limit=1)
@@ -48,9 +49,10 @@ class Rating(models.Model):
             rating.write({'rating' : rate})
             if hasattr(self.env[rating.res_model], 'message_post'):
                 record = self.env[rating.res_model].sudo().browse(rating.res_id)
-                record.message_post(
+                record.sudo().message_post(
                     body="%s %s <br/><img src='/rating/static/src/img/rating_%s.png' style='width:20px;height:20px'/>"
                     % (rating.sudo().partner_id.name, _('rated it'), rate),
+                    subtype='mail.mt_comment',
                     author_id=rating.partner_id and rating.partner_id.id or None # None will set the default author in mail_thread.py
                 )
         return rating
@@ -119,8 +121,6 @@ class RatingMixin(models.AbstractModel):
     @api.multi
     def rating_get_stats(self):
         """ get the repatition of rating grade for the given res_ids.
-            :param list res_ids : optional list of ids. If not given, this will take the ids of the current recordset.
-            :param string res_model : optional name of model. If not given, the one of the current recordset will be used.
             :return dictionnary where the key is the rating value (the note), and the value, the number of object (res_model, res_id) having the value
         """
         data = self.env['rating.rating'].read_group([('res_model', '=', self._name), ('res_id', 'in', self.ids), ('rating', '>=', 0)], ['rating'], ['rating', 'res_id'])
@@ -132,8 +132,6 @@ class RatingMixin(models.AbstractModel):
     @api.multi
     def rating_get_grades(self):
         """ get the repatition of rating grade for the given res_ids.
-            :param list res_ids : optional list of ids. If not given, this will take the ids of the current recordset.
-            :param string res_model : optional name of model. If not given, the one of the current recordset will be used.
             :return dictionnary where the key is the grade (great, okay, bad), and the value, the number of object (res_model, res_id) having the grade
                     the grade are compute as    0-30% : Bad
                                                 31-69%: Okay
diff --git a/addons/rating_project/models/project.py b/addons/rating_project/models/project.py
index 78181fd1cb8..e1f24ce6381 100644
--- a/addons/rating_project/models/project.py
+++ b/addons/rating_project/models/project.py
@@ -11,6 +11,10 @@ class ProjectTaskType(models.Model):
         string='Rating Email Template',
         domain=[('model', '=', 'rating.rating')],
         help="Select an email template. An email will be sent to the customer when the task reach this step.")
+    auto_validation_kanban_state = fields.Boolean('Auto Kanban state validation', default=False,
+        help="Automatically modify the kanban state when the customer reply to the feedback for this stage.\n"
+            " * A great feedback from the customer will update the kanban state to 'ready for the new stage' (green bullet).\n"
+            " * A medium or a bad feedback will set the kanban state to 'blocked' (red bullet).\n")
 
 class Task(models.Model):
 
@@ -67,4 +71,25 @@ class Project(models.Model):
     @api.multi
     def action_view_all_rating(self):
         """ return the action to see all the rating about the all sort of activity of the project (tasks, issues, ...) """
-        return self.action_view_task_rating()
\ No newline at end of file
+        return self.action_view_task_rating()
+
+
+
+class Rating(models.Model):
+
+    _inherit = "rating.rating"
+
+    @api.model
+    def apply_rating(self, rate, res_model=None, res_id=None, token=None):
+        """ check if the auto_validation_kanban_state is activated. If so, apply the modification of the
+            kanban state according to the given rating.
+        """
+        rating = super(Rating, self).apply_rating(rate, res_model, res_id, token)
+        if rating.res_model == 'project.task':
+            task = self.env[rating.res_model].sudo().browse(rating.res_id)
+            if task.stage_id.auto_validation_kanban_state:
+                if rating.rating > 5:
+                    task.write({'kanban_state' : 'done'})
+                else:
+                    task.write({'kanban_state' : 'blocked'})
+        return rating
diff --git a/addons/rating_project/views/project_view.xml b/addons/rating_project/views/project_view.xml
index 66a913f2de4..7cc2993fccf 100644
--- a/addons/rating_project/views/project_view.xml
+++ b/addons/rating_project/views/project_view.xml
@@ -28,7 +28,8 @@
             <field name="priority" eval="20"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='sequence']" position="after">
-                     <field name="rating_template_id"/>
+                    <field name="rating_template_id"/>
+                    <field name="auto_validation_kanban_state" attrs="{'invisible': [('rating_template_id','=', False)]}"/>
                 </xpath>
             </field>
         </record>
diff --git a/addons/rating_project_issue/models/project_issue.py b/addons/rating_project_issue/models/project_issue.py
index 526c976b5cb..3b4506d9172 100644
--- a/addons/rating_project_issue/models/project_issue.py
+++ b/addons/rating_project_issue/models/project_issue.py
@@ -94,3 +94,23 @@ class Project(models.Model):
         domain = [('rating', '!=', -1)] + domain # prepend the condition to avoid empty rating
         return dict(action, domain=domain)
 
+
+
+class Rating(models.Model):
+
+    _inherit = "rating.rating"
+
+    @api.model
+    def apply_rating(self, rate, res_model=None, res_id=None, token=None):
+        """ check if the auto_validation_kanban_state is activated. If so, apply the modification of the
+            kanban state according to the given rating.
+        """
+        rating = super(Rating, self).apply_rating(rate, res_model, res_id, token)
+        if rating.res_model == 'project.issue':
+            issue = self.env[rating.res_model].sudo().browse(rating.res_id)
+            if issue.stage_id.auto_validation_kanban_state:
+                if rating.rating > 5:
+                    issue.write({'kanban_state' : 'done'})
+                else:
+                    issue.write({'kanban_state' : 'blocked'})
+        return rating