Mailing lists are popular tools for the exchange of thoughts and opinions: they make multiple (written) dialogues possible as well as the archiving for future references. In this work the mailinglist-software “mailman” is modified to allow only one single posting from a sender. The user is able to subscribe and to receive messages endlessly but post only once and by this immediately get unsubscribed. The idea of “exchange” is thereby turned into something absurd: one can listen but only talk once. Sending a message thus requires meaningful content, “chatting” becomes impossible.