I have tested and if I use the "*" in the "Customer" field, while using a Classification in the "Cust.Class" field, the system will send to all contacts in the DB. I am not sure if this is a Bug or not, however I have resorted to using a "Range" in the Customer field and this sees to work as it should. Be very careful with the "*", I had to halt our Mail Gateway, and delete 5000 emails from the outbound queue!