diff --git a/addons/mail/security/ir.model.access.csv b/addons/mail/security/ir.model.access.csv
index adeef30af84..3de1b2dc060 100644
--- a/addons/mail/security/ir.model.access.csv
+++ b/addons/mail/security/ir.model.access.csv
@@ -1,5 +1,5 @@
 id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
-access_mail_message_all,mail.message.all,model_mail_message,,1,1,1,0
+access_mail_message_all,mail.message.all,model_mail_message,,1,0,0,0
 access_mail_message_user,mail.message.user,model_mail_message,base.group_user,1,1,1,1
 access_mail_mail_all,mail.mail.all,model_mail_mail,,1,1,1,0
 access_mail_mail_user,mail.mail.user,model_mail_mail,base.group_user,1,1,1,0