[Djigzo users] Can the subject line be altered?

Is there a way to alter the subject line of an encrypted message? We would like to provide the receiver of the email with some kind of feedback that the message was encrypted. Andreas Behr Diplom Informatiker (FH) Krämer IT Solutions GmbH Alte Koßmannschule Koßmannstraße 7 66571 Eppelborn ---- Gesetzliche Pflichtangaben Krämer IT Solutions GmbH Koßmannstraße 7 66571 Eppelborn Registergericht: Amtsgericht Saarbrücken, HRB 14379 Geschäftsführer: Michael Krämer