Please advise. Using 1.8c with privacy activated so that only subscribers can post. Yet , as Owner, I have started receiving error messages hourly that mail cannot be delivered to a specific address because of permanent errors. Yet, when I go to set NOMAIL or even delete , the return message is that the particular email address is not subscribed . Why am I getting these error messages and what do I do about them? My only suspicion is that the subscriber is using a business email address and, as I have learned, the IS folks at that business have made some changes or did something to a firewall which is causing the problem. ( SImilar to companies which have complicated telephone systems so that the phone number on the employees desk actually records , on the "outside" ( as in caller ID) as something different. This can, I suspect, cofound the LISTServ. What do I do? Barbara Passman AYSO-L