foreach($server in get-transportservice){` 
  $server.Name;` 
  Get-MessageTrackingLog ` 
    -Start "04/06/2016 00:00"` 
    -End "04/08/2016 00:00"` 
    -Server $server.Name ` 
    -Sender max.mustermann@contoso.com ` 
    -Recipients john.doe@someothercorp.com ` 
    -EventID "Deliver" ` 
    | ft}