diff --git a/mail_message_copy_in_partner/README.rst b/mail_message_copy_in_partner/README.rst
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+++ b/mail_message_copy_in_partner/README.rst
@@ -0,0 +1,52 @@
+====================
+mail_message_copy_in_partner
+====================
+
+Installation
+============
+Use Odoo normal module installation procedure to install ``mail_message_copy_in_partner``.
+
+
+Configuration
+=============
+
+Nothing to do
+
+
+Usage
+=====
+If module is installed, notes will never send email to partners not linked to internal users.
+
+
+Known issues / Roadmap
+======================
+
+None yet.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `our issues website <https://github.com/elabore-coop/ux-tools/issues>`_. In case of
+trouble, please check there if your issue has already been
+reported. If you spotted it first, help us smashing it by providing a
+detailed and welcomed feedback.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Clément Thomas
+
+Funders
+-------
+
+The development of this module has been financially supported by:
+* Elabore (https://elabore.coop)
+
+
+Maintainer
+----------
+
+This module is maintained by Elabore.
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diff --git a/mail_message_copy_in_partner/__init__.py b/mail_message_copy_in_partner/__init__.py
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+++ b/mail_message_copy_in_partner/__init__.py
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+# -*- coding: utf-8 -*-
+# Part of Odoo. See LICENSE file for full copyright and licensing details.
+
+from . import models
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diff --git a/mail_message_copy_in_partner/__manifest__.py b/mail_message_copy_in_partner/__manifest__.py
new file mode 100644
index 0000000..d449d0b
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+++ b/mail_message_copy_in_partner/__manifest__.py
@@ -0,0 +1,88 @@
+# Copyright 2022 Laetitia Élabore (Elabore)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+{
+    "name": "mail_message_copy_in_partner",
+    "version": "16.0.1.0.0",
+    "author": "Elabore",
+    "website": "https://github.com/elabore-coop/ux-tools",
+    "maintainer": "Clément",
+    "license": "AGPL-3",
+    "category": "Tools",
+    "summary": "If current model has partner_id field, all messages will be copied in partner's chatter",
+    "description": """
+   :image: https://img.shields.io/badge/licence-AGPL--3-blue.svg
+   :target: http://www.gnu.org/licenses/agpl-3.0-standalone.html
+   :alt: License: AGPL-3
+=================
+mail_message_copy_in_partner
+=================
+If current model has partner_id field, all messages will be copied in partner's chatter
+
+
+Installation
+============
+
+Install ``mail_message_copy_in_partner``, all dependencies will be installed by default.
+
+Known issues / Roadmap
+======================
+
+None yet.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `our issues website
+<https://github.com/elabore-coop/ux-tools/issues>`_. In case of
+trouble, please check there if your issue has already been
+reported. If you spotted it first, help us smashing it by providing a
+detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Elabore: `Icon <https://elabore.coop/web/image/res.company/1/logo?unique=f3db262>`_.
+
+Contributors
+------------
+
+* Clément Thomas
+
+Funders
+-------
+
+The development of this module has been financially supported by:
+* Elabore (https://elabore.coop)
+
+
+Maintainer
+----------
+This module is maintained by Elabore.
+
+""",
+    # any module necessary for this one to work correctly
+    'depends' : ['base_setup'],
+    "qweb": [
+        # "static/src/xml/*.xml",
+    ],
+    "external_dependencies": {
+        "python": [],
+    },
+    # always loaded
+    "data": [        
+        
+    ],
+    # only loaded in demonstration mode
+    "demo": [],
+    "js": [],
+    "css": [],
+    "installable": True,
+    # Install this module automatically if all dependency have been previously
+    # and independently installed.  Used for synergetic or glue modules.
+    "auto_install": False,
+    "application": False,
+}
diff --git a/mail_message_copy_in_partner/models/__init__.py b/mail_message_copy_in_partner/models/__init__.py
new file mode 100644
index 0000000..db2c259
--- /dev/null
+++ b/mail_message_copy_in_partner/models/__init__.py
@@ -0,0 +1 @@
+from . import mail_thread
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diff --git a/mail_message_copy_in_partner/models/mail_thread.py b/mail_message_copy_in_partner/models/mail_thread.py
new file mode 100644
index 0000000..dd54ee7
--- /dev/null
+++ b/mail_message_copy_in_partner/models/mail_thread.py
@@ -0,0 +1,14 @@
+from odoo import api, models, _
+
+
+class MailThread(models.AbstractModel):
+    _inherit = 'mail.thread'
+
+    @api.returns('mail.message', lambda value: value.id)
+    def message_post(self, body='', **kwargs):
+        #send message to related partner        
+        if hasattr(self, 'partner_id') and self.partner_id:
+            msg = _('<b>[%(object)s]</b> %(body)s',object=self._get_html_link(), body=body)
+            self.partner_id.message_post(body=msg, **kwargs)
+        return super(MailThread, self).message_post(body=body, **kwargs)
+    
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