diff --git a/app/DataMapper/CompanySettings.php b/app/DataMapper/CompanySettings.php
index 0b3d132ebb81..225d530b89c5 100644
--- a/app/DataMapper/CompanySettings.php
+++ b/app/DataMapper/CompanySettings.php
@@ -229,7 +229,7 @@ class CompanySettings extends BaseSettings
     public $require_quote_signature = false;  //@TODO ben to confirm
 
     //email settings
-    public $email_sending_method = 'default'; //enum 'default','gmail','office365' //@implemented
+    public $email_sending_method = 'default'; //enum 'default','gmail','office365' 'client_postmark', 'client_mailgun'//@implemented
 
     public $gmail_sending_user_id = '0'; //@implemented