new settings section

app/UI/Client/Setting/Pages/Settings.php

@@ -25,6 +25,7 @@ use ThurData\Servers\KerioEmail\Core\Helper\DnsHelper;
 class Settings extends DataTable implements ClientArea
 {
 
+    use \ThurData\Servers\KerioEmail\Core\UI\Traits\DisableButtonByColumnValue;
     /**
      * labels for statuses
      */
@@ -111,6 +112,8 @@ class Settings extends DataTable implements ClientArea
     public function initContent()
     {
         $this->addActionButton(new EditSettingButton());
+        $this->setDisableByColumnValue('selfdns', 'inactive');
+
     }
 
     /**