In the vast majority of cases, list owners aren't sending DELETE commands to delete the BITNET form of someone's dual subscription; they are sending a DELETE command to get someone off the list, completely. Often the request comes from the user in the form of a mail message asking to be removed from the list. The mail message is usually the Internet address, and the subscription is often a BITNET address, but the opposite is also possible. This is why the DELETE command removes ALL matching addresses, and tells you so. If it worked otherwise, you would then complain that DELETE is not working as it should :-) As Peter said, dual subscriptions are not normally possible. You need a situation like the one he describes, where the two subscriptions were made before the addition of a :internet tag, to get the problem you are experiencing. Eric