diff --git a/addons/mail/models/mail_mail.py b/addons/mail/models/mail_mail.py
index bf2aebaf1fe..87defd3147b 100644
--- a/addons/mail/models/mail_mail.py
+++ b/addons/mail/models/mail_mail.py
@@ -40,6 +40,7 @@ class MailMail(models.Model):
 
     # content
     mail_message_id = fields.Many2one('mail.message', 'Message', required=True, ondelete='cascade', index=True, auto_join=True)
+    mail_message_id_int = fields.Integer(compute='_compute_mail_message_id_int', compute_sudo=True)
     body_html = fields.Text('Rich-text Contents', help="Rich-text/HTML message")
     references = fields.Text('References', help='Message references, such as identifiers of previous messages', readonly=1)
     headers = fields.Text('Headers', copy=False)
@@ -84,6 +85,10 @@ class MailMail(models.Model):
     scheduled_date = fields.Char('Scheduled Send Date',
         help="If set, the queue manager will send the email after the date. If not set, the email will be send as soon as possible.")
 
+    def _compute_mail_message_id_int(self):
+        for mail in self:
+            mail.mail_message_id_int = mail.mail_message_id.id
+
     @api.depends('attachment_ids')
     def _compute_restricted_attachments(self):
         """We might not have access to all the attachments of the emails.
@@ -135,6 +140,21 @@ class MailMail(models.Model):
             self.env['mail.message'].browse(mail_msg_cascade_ids).unlink()
         return res
 
+    @api.model
+    def _add_inherited_fields(self):
+        """Allow to bypass ACLs for some mail message fields.
+
+        This trick add a related_sudo on the inherits fields, it can't be done with
+        >>> subject = fields.Char(related='mail_message_id.subject', related_sudo=True)
+        because the field of <mail.message> will be fetched two times (one time before of
+        the inherits, and a second time because of the related), and so it will add extra
+        SQL queries.
+        """
+        super()._add_inherited_fields()
+        cls = type(self)
+        for field in ('email_from', 'reply_to', 'subject'):
+            cls._fields[field].related_sudo = True
+
     def action_retry(self):
         self.filtered(lambda mail: mail.state == 'exception').mark_outgoing()
 
diff --git a/addons/mail/views/mail_mail_views.xml b/addons/mail/views/mail_mail_views.xml
index 49815bae1f2..1b1cb862061 100644
--- a/addons/mail/views/mail_mail_views.xml
+++ b/addons/mail/views/mail_mail_views.xml
@@ -13,13 +13,13 @@
                         <field name="state" widget="statusbar" statusbar_visible="outgoing,sent,received,exception,cancel"/>
                     </header>
                     <sheet>
-                        <field name="mail_message_id" required="0" invisible="1"/>
+                        <field name="mail_message_id_int" required="0" invisible="1"/>
                         <label for="subject" class="oe_edit_only"/>
                         <h2><field name="subject"/></h2>
                         <div style="vertical-align: top;">
                             by <field name="author_id" class="oe_inline" string="User"/> on <field name="date" readonly="1" class="oe_inline"/>
                             <button name="%(action_email_compose_message_wizard)d" string="Reply" type="action" icon="fa-reply text-warning"
-                                context="{'default_composition_mode':'comment', 'default_parent_id': mail_message_id}" states='received,sent,exception,cancel'/>
+                                context="{'default_composition_mode':'comment', 'default_parent_id': mail_message_id_int}" states='received,sent,exception,cancel'/>
                         </div>
                         <group>
                             <field name="email_from"/>