Heres' an "easy" way: 1) update list definition SUBSCRIPTION= OPEN,CONFIRM 2) note to all subscribers that they will have to resubscribe in the near future 3) DEL listname *@* PW=yourpswd There are other methods too including the method that requires each subscriber to send to the LISTSERV (not list) CONFIRM listname There is a list definition keyword that turns on that requirement but I haven't used it in years since often times, subscribers would send it to the list (and it would get distributed) and some other subscriber would post to the list a question about the just-broadcasted CONFIRM, or would say back to the list, "yes, I got your message." /P