> Those "message opened" acknowledgements are being generated because > the *SENDER* - the person who posted the message to the list - requested Sorry, I don't think so. The errors come from only specific subscribers at specific address and they occur for *all* items. Some of those items are mine (some to the list, some private) and I know full well I did not request an acknowledgement. The problem is with the recipient, not the original sender. Even if the original sender did request an acknowledgement such should go to the original sender, not the list nor owner-listname, no? Douglas Douglas Winship Hays County, Texas [log in to unmask] Secondary AUTOCAT Listowner MEDLAB-L