From: Dominik Riebeling <dominik.riebeling_at_gmail.com>
Date: Mon, 24 Apr 2006 11:19:23 +0200

Just look at the headers of the list mails:

List-Id: Rockbox <rockbox.cool.haxx.se>
List-Unsubscribe: <http://cool.haxx.se/cgi-bin/mailman/listinfo/rockbox>,
        <mailto:rockbox-request_at_cool.haxx.se?subject=unsubscribe>
List-Archive: <http://cool.haxx.se/pipermail/rockbox>
List-Post: <mailto:rockbox_at_cool.haxx.se>
List-Help: <mailto:rockbox-request_at_cool.haxx.se?subject=help>
List-Subscribe: <http://cool.haxx.se/cgi-bin/mailman/listinfo/rockbox>,
        <mailto:rockbox-request_at_cool.haxx.se?subject=subscribe>
Sender: rockbox-bounces_at_cool.haxx.se
Errors-To: rockbox-bounces_at_cool.haxx.se
Received on 2006-04-24