Initial version

__manifest__.py

+###############################################################################
+#
+#    OpenERP, Open Source Management Solution
+#    Copyright (C) 2014, 2018 XCG Consulting (http://www.xcg-consulting.fr/)
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+###############################################################################
+{
+    'name': "Messaging Group",
+    'version': '11.0.1.0',
+    'author': 'XCG Consulting',
+    'website': 'http://odoo.consulting/',
+    'category': 'Discuss',
+    'summary': "Discussions",
+    'description': """
+    Introduce a new group, messaging, and only member of this group can see
+    the messaging menu.
+    """,
+    'depends': [
+        'mail',
+    ],
+    'data': [
+        'security/security.xml',
+    ],
+    'installable': True,
+}
+# vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:

i18n/fr.po

+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#       * mail_messaging_group
+#
+# Vincent Hatakeyama <vincent.Hatakeyama@xcg-consulting.fr>, 2014, 2018.
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 11.0-20180716\n"
+"Report-Msgid-Bugs-To: \n"
+"POT-Creation-Date: 2018-08-29 08:30+0000\n"
+"PO-Revision-Date: 2018-08-29 10:30+0200\n"
+"Last-Translator: Vincent Hatakeyama <vincent.hatakeyama@xcg-consulting.fr>\n"
+"Language-Team: XCG Consulting\n"
+"Language: fr\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: nplurals=2; plural=(n > 1);\n"
+"X-Generator: Virtaal 0.7.1\n"
+
+#. module: mail_messaging_group
+#: model:res.groups,name:mail_messaging_group.group_messaging
+msgid "Messaging"
+msgstr "Messagerie"

security/security.xml

+<?xml version="1.0" encoding="utf-8"?>
+<openerp>
+  <data>
+
+    <!-- Groups -->
+
+    <record id="group_messaging" model="res.groups">
+      <field name="name">Messaging</field>
+    </record>
+
+    <!-- Remove messaging menu for non messaging users -->
+
+    <record id="mail.mail_channel_menu_root_chat" model="ir.ui.menu">
+      <field name="groups_id" eval="[(6, 0, [ref('group_messaging')])]" />
+    </record>
+
+  </data>
+</openerp>