> @ Sasaki ..concerning the mailing list there is a number of Drupal modules, no idea which one is being in use here
there is also categories as Mail Mailing lists on Drupal sites -- Overview https://www.drupal.org/node/1401228 https://www.drupal.org/project/mailsystem an interesting one is https://www.drupal.org/project/og organic groups which lets users create there own groups
