blackvj,
$in_count = mysql_result(mysql_query('SELECT COUNT(DISTINCT `id_kont`, `id_user`) FROM `mail_msg` WHERE `id_user`!=' . $user_id . ' AND `id_kont`=' . $user_id . ' AND `sys`=1 AND `delete`!=' . $user_id . ' AND `spam`=1;'), 0);Так попробуй.