Version 7.0 of Subscribe2 introduced a new feature where Registered Subscribers could opt-out of receiving notifications from specific authors on multi-author sites.
Version 8.0 has improved on this a little by allowing site administrators to use a filter to trim down the list so unused author accounts can be removed from the list. To do this you simply code a small plugin extension something like this:
// 's2_authors' is the names of the new filter add_filter('s2_authors', 'remove_author'); function remove_author($authors) { // our function takes an array of author objects as the input // you can then cycle through the array and remove any that you like on either 'ID' or 'display_name' $i = 0; foreach ( $authors as $author ) { // example use an if statement to check if author ID should be removed compared to a known ID if ( $author->ID == 1 ) { unset($authors[$i]); } $i++; } return $authors; }