diff --git a/odoo/addons/base/models/ir_mail_server.py b/odoo/addons/base/models/ir_mail_server.py
index 8858fd3602c..e735c871708 100644
--- a/odoo/addons/base/models/ir_mail_server.py
+++ b/odoo/addons/base/models/ir_mail_server.py
@@ -283,11 +283,11 @@ class IrMailServer(models.Model):
 
         email_body = ustr(body)
         if subtype == 'html' and not body_alternative:
-            msg.add_alternative(email_body, subtype=subtype, charset='utf-8')
             msg.add_alternative(html2text.html2text(email_body), subtype='plain', charset='utf-8')
-        elif body_alternative:
             msg.add_alternative(email_body, subtype=subtype, charset='utf-8')
+        elif body_alternative:
             msg.add_alternative(ustr(body_alternative), subtype=subtype_alternative, charset='utf-8')
+            msg.add_alternative(email_body, subtype=subtype, charset='utf-8')
         else:
             msg.set_content(email_body, subtype=subtype, charset='utf-8')