Quote by skyvue:As far as I can tell the info is stored in gl_userprefs but I\'m not sure of what value needs to be changed.
Nope, it\'s the field \'etids\' in gl_userindex. It can hold a list of topics (meaning the user is only subscribed to those topics) or a \'-\' (dash), meaning the user doesn\'t want to get any digest mails. When it\'s empty or NULL that will be interpreted as being subscribed to all topics.
I\'d strongly suggest that you ask those users or at least announce what you\'re about to do on your site, as some people may not like that.
bye, Dirk