diff --git a/addons/website_slides/controllers/main.py b/addons/website_slides/controllers/main.py
index adc6aeaad39..0b7fdb47982 100644
--- a/addons/website_slides/controllers/main.py
+++ b/addons/website_slides/controllers/main.py
@@ -168,52 +168,6 @@ class WebsiteSlides(http.Controller):
         response.mimetype = 'application/pdf'
         return response
 
-    @http.route('''/slides/slide/<model("slide.slide", "[('channel_id.can_see', '=', True)]"):slide>/comment''', type='http', auth="public", methods=['POST'], website=True)
-    def slide_comment(self, slide, **post):
-        """ Controller for message_post. Public user can post; their name and
-        email is used to find or create a partner and post as admin with the
-        right partner. Their comments are unpublished by default. Logged
-        users can post as usual. """
-        # TDE TODO :
-        # - subscribe partner instead of user writing the message ?
-        # - public user -> cannot create mail.message ?
-        if not post.get('comment'):
-            return werkzeug.utils.redirect(request.httprequest.referrer + "#discuss")
-        # public user: check or find author based on email, do not subscribe public user
-        # and do not publish their comments by default to avoid direct spam
-        if request.uid == request.website.user_id.id:
-            if not post.get('email'):
-                return werkzeug.utils.redirect(request.httprequest.referrer + "#discuss")
-            # TDE FIXME: public user has no right to create mail.message, should
-            # be investigated - using SUPERUSER_ID meanwhile
-            contextual_slide = slide.sudo().with_context(mail_create_nosubcribe=True)
-            # TDE FIXME: check in mail_thread, find partner from emails should maybe work as public user
-            partner_id = slide.sudo()._find_partner_from_emails([post.get('email')])[0]
-            if partner_id:
-                partner = request.env['res.partner'].sudo().browse(partner_id)
-            else:
-                partner = request.env['res.partner'].sudo().create({
-                    'name': post.get('name', post['email']),
-                    'email': post['email']
-                })
-            post_kwargs = {
-                'author_id': partner.id,
-                'website_published': False,
-                'email_from': partner.email,
-            }
-        # logged user: as usual, published by default
-        else:
-            contextual_slide = slide
-            post_kwargs = {}
-
-        contextual_slide.message_post(
-            body=post['comment'],
-            message_type='comment',
-            subtype='mt_comment',
-            **post_kwargs
-        )
-        return werkzeug.utils.redirect(request.httprequest.referrer + "#discuss")
-
     @http.route('''/slides/slide/<model("slide.slide", "[('channel_id.can_see', '=', True), ('download_security', '=', 'public')]"):slide>/download''', type='http', auth="public", website=True)
     def slide_download(self, slide):
         if slide.download_security == 'public' or (slide.download_security == 'user' and request.session.uid):
diff --git a/addons/website_slides/models/slides.py b/addons/website_slides/models/slides.py
index f8726cf66b2..6607e5cb4ac 100644
--- a/addons/website_slides/models/slides.py
+++ b/addons/website_slides/models/slides.py
@@ -261,6 +261,7 @@ class Slide(models.Model):
     _name = 'slide.slide'
     _inherit = ['mail.thread', 'website.seo.metadata', 'website.published.mixin']
     _description = 'Slides'
+    _mail_post_access = 'read'
 
     _PROMOTIONAL_FIELDS = [
         '__last_update', 'name', 'image_thumb', 'image_medium', 'slide_type', 'total_views', 'category_id',
diff --git a/addons/website_slides/views/website_slides.xml b/addons/website_slides/views/website_slides.xml
index 4cea61c1c3e..2dc648e75d0 100644
--- a/addons/website_slides/views/website_slides.xml
+++ b/addons/website_slides/views/website_slides.xml
@@ -543,49 +543,9 @@
                                     </h4>
                                 </div>
                                 <div t-att-class="comments and 'tab-pane fade active in' or 'tab-pane fade'" id="discuss">
-                                    <form id="comment" class="js_website_submit_form" t-attf-action="/slides/slide/#{slide.id}/comment" method="POST">
-                                        <input type="hidden" name="csrf_token" t-att-value="request.csrf_token()"/>
-                                        <div class="media">
-                                            <span class="pull-left" t-if="not is_public_user">
-                                                <img class="img img-circle media-object"
-                                                    t-att-src="'/web/image?model=res.partner&amp;field=image_small&amp;id='+str(user_id.partner_id.id)"
-                                                    style="width: 30px"/>
-                                            </span>
-                                            <div class="media-body">
-                                                <div t-if="is_public_user" class="col-md-6">
-                                                    <input type="name" class="form-control mb8" required="true" name="name" placeholder="Your Name"/>
-                                                    <input type="email" class="form-control mb8" required="true" name="email" placeholder="Email Address"/>
-                                                </div>
-                                                <div t-if="is_public_user" class="col-md-6">
-                                                    <p class="text-muted small">
-                                                        Post comment with email address (confirmation of email is required in order to publish comment on website) or please
-                                                        <a t-attf-href="/web?redirect=#{request.httprequest.url}">login</a>
-                                                        to post comment
-                                                    </p>
-                                                </div>
-                                                <div class="col-md-12">
-                                                    <textarea rows="3" name="comment" class="o_slides_comment form-control" required="true" placeholder="Write a comment..."></textarea>
-                                                    <button type="submit" class="btn btn-primary mt8">Post</button>
-                                                </div>
-                                            </div>
-                                        </div>
-                                    </form>
-                                    <ul class="media-list mt8">
-                                        <li t-foreach="comments" t-as="message" class="media">
-                                            <span class="pull-left">
-                                                <img class="media-object img img-circle"
-                                                    t-att-src="'/web/image?model=mail.message&amp;field=author_avatar&amp;id='+str(message.id)" style="width: 30px"/>
-                                            </span>
-                                            <div class="media-body">
-                                                <t t-call="website.publish_short">
-                                                    <t t-set="object" t-value="message"/>
-                                                </t>
-                                                <span t-field="message.author_id" style="display: inline-block;" t-options='{"widget": "contact", "fields": ["name"]}'/>
-                                                <span class="text-muted">on<span t-field="message.date"/></span>
-                                                <div t-field="message.body" class="discussion_scroll_post"></div>
-                                            </div>
-                                        </li>
-                                    </ul>
+                                    <t t-call="website_mail.message_thread">
+                                        <t t-set="object" t-value="slide"/>
+                                    </t>
                                 </div>
                                 <div class="tab-pane fade oe_slides_transcript" id="transcript">
                                     <t t-if="slide.index_content">