The LISTSERV monitor was just changed to poll all servers every day instead of every 3 days (to get more accurate data on weekday vs weekend traffic). Because of this change and of a major IP outage in the US, the US sites that had been polled today, a few hours before the change, but whose answer had not arrived when the change was made, are all being told that the monitor was unable to contact their server and that they should check things carefully. These messages can be safely ignored and, in principle, should not occur again. I knew about the connectivity outage, but had just assumed it had occurred after the daily job; it turned out this was a very long outage. Eric