The list header keyword says your list will not accept files. But of course there still exists a field in the user subscription which says whether this particular user wants to get files. There is no reason for LISTSERV to change these fields, with "Files= NO" you cannot send files anyway, and you'd be sorry it had changed them if you decided to re-enable files 2 days later after numerous complaints. The default value of this field for new users is controlled by "Default-Options=" like all other options. Eric