My list was just moved from one server to another, both running ver. 1.8d. On the previous server passive probing worked fine. But when I try to write ,Probe(n) into Auto-Delete= on the new server, I get an "invalid parameter value" error msg, and LISTSERV rejects the change. The manual sez that passive probing is the default for small lists such as mine, but I don't see any evidence that probes are going out; instead, on the new list I've so far gotten only the usual (non-probe) bounce reports. Any suggestions? TIA, ed --- Ed Agro, Peacenet Balkans Desk, Boston [log in to unmask]