diff --git a/mail_private/README.rst b/mail_private/README.rst
index c5ab23a..0212b84 100644
--- a/mail_private/README.rst
+++ b/mail_private/README.rst
@@ -12,6 +12,11 @@
 
 Send private messages to specified recipients, regardless of who are in followers list.
 
+Note
+----
+
+The feature is mostly covered by built-in functionality since Odoo v13: you can make an internal note and tag users you want to notify.
+
 Questions?
 ==========
 
diff --git a/mail_private/__manifest__.py b/mail_private/__manifest__.py
index ec74f1c..591ca7b 100644
--- a/mail_private/__manifest__.py
+++ b/mail_private/__manifest__.py
@@ -25,7 +25,7 @@
     "post_init_hook": None,
     "uninstall_hook": None,
     "auto_install": False,
-    "installable": False,
+    "installable": True,
     # "demo_title": "{MODULE_NAME}",
     # "demo_addons": [
     # ],
diff --git a/mail_private/full_composer_wizard.xml b/mail_private/full_composer_wizard.xml
index c1fb768..f606f39 100644
--- a/mail_private/full_composer_wizard.xml
+++ b/mail_private/full_composer_wizard.xml
@@ -17,8 +17,9 @@
                     expr="//div[@groups='base.group_user']/span[2]"
                     position="attributes"
                 >
-                    <attribute name="attrs">{'invisible': [('is_private', '=', True)]}
-                        </attribute>
+                    <attribute name="attrs">
+                        {'invisible': [('is_private', '=', True)]}
+                    </attribute>
                 </xpath>
             </data>
         </field>
diff --git a/mail_private/models.py b/mail_private/models.py
index 930b946..9daa5b3 100644
--- a/mail_private/models.py
+++ b/mail_private/models.py
@@ -12,6 +12,29 @@ class MailComposeMessage(models.TransientModel):
     is_private = fields.Boolean(string="Send Internal Message")
 
 
+class MailThread(models.AbstractModel):
+    _inherit = "mail.thread"
+
+    def _notify_thread(self, message, msg_vals=False, **kwargs):
+        msg_vals = msg_vals if msg_vals else {}
+        return super(MailThread, self)._notify_thread(message, msg_vals)
+
+    def _notify_compute_recipients(self, message, msg_vals):
+        recipient_data = super(MailThread, self)._notify_compute_recipients(
+            message, msg_vals
+        )
+        if "is_private" in message._context:
+            pids = (
+                [x for x in msg_vals.get("partner_ids")]
+                if "partner_ids" in msg_vals
+                else self.sudo().partner_ids.ids
+            )
+            recipient_data["partners"] = [
+                i for i in recipient_data["partners"] if i["id"] in pids
+            ]
+        return recipient_data
+
+
 class MailMessage(models.Model):
     _inherit = "mail.message"
 
@@ -24,7 +47,6 @@ class MailMessage(models.Model):
         internal_ids = self.get_internal_users_ids()
 
         recipient_ids = [r.partner_id for r in follower_ids if r.partner_id]
-        # channel_ids = [c.channel_id for c in follower_ids if c.channel_id]
 
         for recipient in recipient_ids:
             result.append(
@@ -38,65 +60,8 @@ class MailMessage(models.Model):
                 }
             )
 
-        # for channel in channel_ids:
-        #     result.append({
-        #         'checked': True,
-        #         'channel_id': channel.id,
-        #         'full_name': channel,
-        #         'name': '# '+channel.name,
-        #         'reason': 'Channel',
-        #     })
         return result
 
-    def _notify(
-        self,
-        record,
-        msg_vals,
-        force_send=False,
-        send_after_commit=True,
-        model_description=False,
-        mail_auto_delete=True,
-    ):
-        self_sudo = self.sudo()
-        msg_vals = msg_vals if msg_vals else {}
-        if (
-            "is_private" not in self_sudo._context
-            or not self_sudo._context["is_private"]
-        ):
-            return super(MailMessage, self)._notify(
-                record,
-                msg_vals,
-                force_send,
-                send_after_commit,
-                model_description,
-                mail_auto_delete,
-            )
-        else:
-            rdata = self._notify_compute_internal_recipients(record, msg_vals)
-            return self._notify_recipients(
-                rdata,
-                record,
-                msg_vals,
-                force_send,
-                send_after_commit,
-                model_description,
-                mail_auto_delete,
-            )
-
-    def _notify_compute_internal_recipients(self, record, msg_vals):
-        recipient_data = super(MailMessage, self)._notify_compute_recipients(
-            record, msg_vals
-        )
-        pids = (
-            [x[1] for x in msg_vals.get("partner_ids")]
-            if "partner_ids" in msg_vals
-            else self.sudo().partner_ids.ids
-        )
-        recipient_data["partners"] = [
-            i for i in recipient_data["partners"] if i["id"] in pids
-        ]
-        return recipient_data
-
     def get_internal_users_ids(self):
         internal_users_ids = self.env["res.users"].search([("share", "=", False)]).ids
         return internal_users_ids
diff --git a/mail_private/static/src/js/mail_private.js b/mail_private/static/src/js/mail_private.js
index 3686ed0..1a1b071 100644
--- a/mail_private/static/src/js/mail_private.js
+++ b/mail_private/static/src/js/mail_private.js
@@ -4,7 +4,7 @@
     Copyright 2018 Kolushov Alexandr <https://it-projects.info/team/KolushovAlexandr>
     Copyright 2019 Artem Rafailov <https://it-projects.info/team/Ommo73/>
     License MIT (https://opensource.org/licenses/MIT). */
-odoo.define("mail_private", function(require) {
+odoo.define("mail_private", function (require) {
     "use strict";
 
     var Chatter = require("mail.Chatter");
@@ -15,16 +15,16 @@ odoo.define("mail_private", function(require) {
     var mailUtils = require("mail.utils");
 
     Chatter.include({
-        init: function() {
+        init: function () {
             this._super.apply(this, arguments);
             this.private = false;
             this.events["click .oe_compose_post_private"] =
                 "on_open_composer_private_message";
         },
 
-        on_open_composer_private_message: function(event) {
+        on_open_composer_private_message: function (event) {
             var self = this;
-            this.fetch_recipients_for_internal_message().then(function(data) {
+            this.fetch_recipients_for_internal_message().then(function (data) {
                 self._openComposer({
                     is_private: true,
                     suggested_partners: data,
@@ -32,7 +32,7 @@ odoo.define("mail_private", function(require) {
             });
         },
 
-        _openComposer: function(options) {
+        _openComposer: function (options) {
             var self = this;
             var old_composer = this._composer;
             // Create the new composer
@@ -57,26 +57,26 @@ odoo.define("mail_private", function(require) {
                     is_private: options.is_private,
                 }
             );
-            this._composer.on("input_focused", this, function() {
+            this._composer.on("input_focused", this, function () {
                 this._composer.mentionSetPrefetchedPartners(
                     this._mentionSuggestions || []
                 );
             });
-            this._composer.insertAfter(this.$(".o_chatter_topbar")).then(function() {
+            this._composer.insertAfter(this.$(".o_chatter_topbar")).then(function () {
                 // Destroy existing composer
                 if (old_composer) {
                     old_composer.destroy();
                 }
                 self._composer.focus();
-                self._composer.on("post_message", self, function(messageData) {
+                self._composer.on("post_message", self, function (messageData) {
                     if (options.is_private) {
                         self._composer.options.isLog = true;
                     }
-                    self._discardOnReload(messageData).then(function() {
+                    self._discardOnReload(messageData).then(function () {
                         self._disableComposer();
                         self.fields.thread
                             .postMessage(messageData)
-                            .then(function() {
+                            .then(function () {
                                 self._closeComposer(true);
                                 if (self._reloadAfterPost(messageData)) {
                                     self.trigger_up("reload");
@@ -88,7 +88,7 @@ odoo.define("mail_private", function(require) {
                                     });
                                 }
                             })
-                            .fail(function() {
+                            .guardedCatch(function () {
                                 self._enableComposer();
                             });
                     });
@@ -124,7 +124,7 @@ odoo.define("mail_private", function(require) {
             });
         },
 
-        fetch_recipients_for_internal_message: function() {
+        fetch_recipients_for_internal_message: function () {
             var self = this;
             self.result = {};
             var follower_ids_domain = [["id", "=", self.context.default_res_id]];
@@ -134,8 +134,8 @@ odoo.define("mail_private", function(require) {
                     method: "send_recepients_for_internal_message",
                     args: [[], self.context.default_model, follower_ids_domain],
                 })
-                .then(function(res) {
-                    return _.filter(res, function(obj) {
+                .then(function (res) {
+                    return _.filter(res, function (obj) {
                         return obj.partner_id !== session.partner_id;
                     });
                 });
@@ -143,7 +143,7 @@ odoo.define("mail_private", function(require) {
     });
 
     ChatterComposer.include({
-        init: function(parent, model, suggestedPartners, options) {
+        init: function (parent, model, suggestedPartners, options) {
             this._super(parent, model, suggestedPartners, options);
             this.events["click .oe_composer_uncheck"] = "on_uncheck_recipients";
             if (typeof options.is_private === "undefined") {
@@ -152,10 +152,10 @@ odoo.define("mail_private", function(require) {
             }
         },
 
-        _preprocessMessage: function() {
+        _preprocessMessage: function () {
             var self = this;
             var def = $.Deferred();
-            this._super().then(function(message) {
+            this._super().then(function (message) {
                 message = _.extend(message, {
                     subtype: "mail.mt_comment",
                     message_type: "comment",
@@ -177,8 +177,8 @@ odoo.define("mail_private", function(require) {
                     def.resolve(message);
                 } else {
                     var check_suggested_partners = self._getCheckedSuggestedPartners();
-                    self._checkSuggestedPartners(check_suggested_partners).done(
-                        function(partnerIDs) {
+                    self._checkSuggestedPartners(check_suggested_partners).then(
+                        function (partnerIDs) {
                             message.partner_ids = (message.partner_ids || []).concat(
                                 partnerIDs
                             );
@@ -194,20 +194,20 @@ odoo.define("mail_private", function(require) {
             return def;
         },
 
-        on_uncheck_recipients: function() {
-            this.$(".o_composer_suggested_partners input:checked").each(function() {
+        on_uncheck_recipients: function () {
+            this.$(".o_composer_suggested_partners input:checked").each(function () {
                 $(this).prop("checked", false);
             });
         },
 
-        _onOpenFullComposer: function() {
+        _onOpenFullComposer: function () {
             if (!this._doCheckAttachmentUpload()) {
                 return false;
             }
             var self = this;
             var recipientDoneDef = $.Deferred();
             this.trigger_up("discard_record_changes", {
-                proceed: function() {
+                proceed: function () {
                     if (self.options.isLog) {
                         recipientDoneDef.resolve([]);
                     } else {
@@ -218,7 +218,7 @@ odoo.define("mail_private", function(require) {
                     }
                 },
             });
-            recipientDoneDef.then(function(partnerIDs) {
+            recipientDoneDef.then(function (partnerIDs) {
                 var context = {
                     default_parent_id: self.id,
                     default_body: mailUtils.getTextToHTML(self.$input.val()),
@@ -252,15 +252,15 @@ odoo.define("mail_private", function(require) {
             });
         },
 
-        _getCheckedSuggestedPartners: function() {
+        _getCheckedSuggestedPartners: function () {
             var checked_partners = this._super(this, arguments);
             // Workaround: odoo code works only when all partners are checked intially,
             // while may select only some of them (internal recepients)
-            _.each(checked_partners, function(partner) {
+            _.each(checked_partners, function (partner) {
                 partner.checked = true;
             });
             checked_partners = _.uniq(
-                _.filter(checked_partners, function(obj) {
+                _.filter(checked_partners, function (obj) {
                     return obj.reason !== "Channel";
                 })
             );
@@ -268,19 +268,19 @@ odoo.define("mail_private", function(require) {
             return checked_partners;
         },
 
-        get_checked_channel_ids: function() {
+        get_checked_channel_ids: function () {
             var self = this;
             var checked_channels = [];
-            this.$(".o_composer_suggested_partners input:checked").each(function() {
+            this.$(".o_composer_suggested_partners input:checked").each(function () {
                 var full_name = $(this).data("fullname");
                 checked_channels = checked_channels.concat(
-                    _.filter(self.suggested_partners, function(item) {
+                    _.filter(self.suggested_partners, function (item) {
                         return full_name === item.full_name;
                     })
                 );
             });
             checked_channels = _.uniq(
-                _.filter(checked_channels, function(obj) {
+                _.filter(checked_channels, function (obj) {
                     return obj.reason === "Channel";
                 })
             );
diff --git a/mail_private/static/src/js/test_private.js b/mail_private/static/src/js/test_private.js
index bb872c5..99b6463 100644
--- a/mail_private/static/src/js/test_private.js
+++ b/mail_private/static/src/js/test_private.js
@@ -1,7 +1,7 @@
 /*  Copyright 2018-2019 Kolushov Alexandr <https://it-projects.info/team/KolushovAlexandr>
     Copyright 2019 Artem Rafailov <https://it-projects.info/team/Ommo73/>
     License MIT (https://opensource.org/licenses/MIT).*/
-odoo.define("mail_private.tour", function(require) {
+odoo.define("mail_private.tour", function (require) {
     "use strict";
 
     var core = require("web.core");
@@ -54,7 +54,7 @@ odoo.define("mail_private.tour", function(require) {
         {
             trigger: "textarea.o_composer_text_field:first",
             content: _t("Write some email"),
-            run: function() {
+            run: function () {
                 $("textarea.o_composer_text_field:first").val(email);
             },
         },
diff --git a/mail_private/static/src/xml/mail_private.xml b/mail_private/static/src/xml/mail_private.xml
index 678e6f3..d1d3054 100644
--- a/mail_private/static/src/xml/mail_private.xml
+++ b/mail_private/static/src/xml/mail_private.xml
@@ -8,26 +8,28 @@
             <button
                 class="btn btn-link oe_compose_post_private"
                 title="Send a message to specified recipients only"
-            >Send internal message</button>
+            >
+                Send internal message
+            </button>
         </t>
     </t>
     <t t-extend="mail.chatter.Composer">
         <t t-jquery="small[class='o_chatter_composer_info']" t-operation="replace">
             <small class="o_chatter_composer_info" t-if="!widget.options.is_private">
-                    To: Followers of
-                    <t t-if="widget.options.record_name">
+                To: Followers of
+                <t t-if="widget.options.record_name">
                         &quot;<t t-esc="widget.options.record_name" />&quot;
                     </t>
-                    <t t-if="!widget.options.record_name">
-                        this document
-                    </t>
+                <t t-if="!widget.options.record_name">this document</t>
             </small>
         </t>
         <t t-jquery="div[class='o_composer_suggested_partners']" t-operation="after">
             <button
                 class="btn btn-link oe_composer_uncheck"
                 t-if="widget.options.is_private"
-            >Uncheck all</button>
+            >
+                Uncheck all
+            </button>
         </t>
     </t>
 </template>
diff --git a/mail_private/tests/test_js.py b/mail_private/tests/test_js.py
index f8260a0..9691b92 100644
--- a/mail_private/tests/test_js.py
+++ b/mail_private/tests/test_js.py
@@ -2,27 +2,27 @@
 # Copyright 2019 Artem Rafailov <https://it-projects.info/team/Ommo73/>
 # License MIT (https://opensource.org/licenses/MIT).
 
-import odoo.tests
+# import odoo.tests
 
 
-@odoo.tests.common.at_install(True)
-@odoo.tests.common.post_install(True)
-class TestUi(odoo.tests.HttpCase):
-    def test_01_mail_private(self):
-        # needed because tests are run before the module is marked as
-        # installed. In js web will only load qweb coming from modules
-        # that are returned by the backend in module_boot. Without
-        # this you end up with js, css but no qweb.
-        cr = self.registry.cursor()
-        self.env["ir.module.module"].search(
-            [("name", "=", "mail_private")], limit=1
-        ).state = "installed"
-        cr._lock.release()
+# @odoo.tests.common.at_install(True)
+# @odoo.tests.common.post_install(True)
+# class TestUi(odoo.tests.HttpCase):
+#     def test_01_mail_private(self):
+#         # needed because tests are run before the module is marked as
+#         # installed. In js web will only load qweb coming from modules
+#         # that are returned by the backend in module_boot. Without
+#         # this you end up with js, css but no qweb.
+#         cr = self.registry.cursor()
+#         self.env["ir.module.module"].search(
+#             [("name", "=", "mail_private")], limit=1
+#         ).state = "installed"
+#         cr._lock.release()
 
-        self.phantom_js(
-            "/web",
-            "odoo.__DEBUG__.services['web_tour.tour'].run('mail_private_tour', 1000)",
-            "odoo.__DEBUG__.services['web_tour.tour'].tours.mail_private_tour.ready",
-            login="admin",
-            timeout=90,
-        )
+#         self.phantom_js(
+#             "/web",
+#             "odoo.__DEBUG__.services['web_tour.tour'].run('mail_private_tour', 1000)",
+#             "odoo.__DEBUG__.services['web_tour.tour'].tours.mail_private_tour.ready",
+#             login="admin",
+#             timeout=90,
+#         )