> Maybe you could use TOPICS Doesn't this mean we need to include the TOPIC name in the SUBJECT tag? If so this is not a valid option since we need full control over the Subject content. > subscribers (or to B, or to both)? I don't really understand > your requirement fully, and you don't explain how you identify > which group, A or B (or both) a subscriber qualifies for It is a mass marketing E-mail. Recipients are selected from our CRM database based on various criteria. We are using the list only as a back-end to allow unsubscribes, so we're not worried about the user messing things up. That is one reason we want to reset the options each time we do a mailing. -- Dave