Could this be at all related to the fact that the listserv installation here, when it processes updates, has been trying unsuccessfully to send mail to io.jovian.net for the past week? Could information not be updated as it should be? Or perhaps it is just that the Internet providers of these subscribers are having problems and they coincidentally happened at the same time? Perhaps the messages to these subscribers are sitting in the queue at your local mail server? Or they go timed out on delivery and the errors went to the postmaster at your site instead of to you or they were bounced by the mail server at the other end and the errors went to the postmaster at your site instead of you? (That happens here all the time.) Karen Strauss Reflex Sympathetic Dystrophy Network [log in to unmask]