[IMP] mail_message_copy_in_partner:

new message is a note without recipients

mail_message_copy_in_partner/__manifest__.py

@@ -18,6 +18,7 @@
 mail_message_copy_in_partner
 =================
 If current model has partner_id field, all messages will be copied in partner's chatter
+New message is a note without recipients
 
 
 Installation

mail_message_copy_in_partner/models/mail_thread.py

@@ -8,7 +8,17 @@ class MailThread(models.AbstractModel):
     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)
+            msg = _('<b>[%(object)s]</b> %(body)s',object=self._get_html_link(), body=body)       
+
+            new_kwargs = kwargs.copy()
+
+            #new message is a note
+            new_kwargs['subtype_xmlid'] = "mail.mt_note"
+
+            #do not send anything
+            new_kwargs['partner_ids'] = []            
+
+            self.partner_id.message_post(body=msg, **new_kwargs)
+
         return super(MailThread, self).message_post(body=body, **kwargs)