Recently we shut down a list with about 1600 addresses in the subscriber list, made some major modifications in how the list is managed, and then restarted the list. Before restarting the list, I deleted everyone from the list, then deleted duplicated addresses, and resubscribed everyone. I then sent out three test messages over a two week period, in which I invited people who did not want to be on the list any longer to unsubscribe, or let me know. At the same time, sending the test message had the salubrious effect of exposing addresses that were no longer valid. Here's my problem now: there seem to be quite a number of subscribers who are subscribed under an old address, from which mail from the list is forwarded to their current address. Often this is a change within their own system -- a new mail system, a new server, a new way of doing things. They can thus receive mail, but when they try to send something back to the list, or change their subscription options, LISTSERV bounces their mail with the message that they are not authorized to do what they want to do. My question: is there a way of testing all the addresses now in the subscriber list, behind the scenes, so to speak, so that LISTSERV can check the addresses, and send me a list of those that are not current? Many thanks for your collective wisdom on this. Bill -- Dr. W. Schipper Email: [log in to unmask] Department of English, Tel: 709-737-4406 Memorial University Fax: 709-737-4528 St John's, Nfld. A1C 5S7