diff --git a/odoo/addons/base/models/ir_mail_server.py b/odoo/addons/base/models/ir_mail_server.py
index 84b44c19aaf..3bc39f4cb54 100644
--- a/odoo/addons/base/models/ir_mail_server.py
+++ b/odoo/addons/base/models/ir_mail_server.py
@@ -129,6 +129,7 @@ class IrMailServer(models.Model):
     """Represents an SMTP server, able to send outgoing emails, with SSL and TLS capabilities."""
     _name = "ir.mail_server"
     _description = 'Mail Server'
+    _order = 'sequence'
 
     NO_VALID_RECIPIENT = ("At least one valid recipient address should be "
                           "specified for outgoing emails (To/Cc/Bcc)")