etids
in table gl_userindex
to an empty string for all the users that should receive the Daily Digest (the field is set to \'-\' by default).
You can also set $_CONF[\'emailstoriesperdefault\'] = 1;
in config.php, so that any new users will get the Daily Digest automatically.
I\'d suggest you post note about that somewhere on your site when you do that, though, since some of your users may not like this ...
bye, Dirk