The Mandriva mailing lists are working again. However, we had to restore the subscriber lists from a backup, and...it's quite an old backup (around a year old). If you subscribed to any Mandriva mailing lists in the last year, you will probably need to re-subscribe. You can check your subscriptions from the web interface, or just use the information on the wiki for the Cooker-related lists.
Some people who unsubscribed in the last year have been re-subscribed because of this problem. We're really sorry about that!