To use this exploder, send mail to astro@atnf.csiro.au , and your message will be broadcast to all participants in the discussion. To subscribe, unsubscribe, or use other commands you have to use a *DIFFERENT* email address, which is astro-request@atnf.csiro.au . For example, to subscribe to the exploder, you send a mail to astro-request@atnf.csiro.au , with no subject, but in the body of the mail you should have the single word "subscribe". ... unsubscribe . ...