On 8 Oct 98 at 8:00, Pete Weiss wrote: > I don't recall the format, but to give some concreteness I could > imagine a probe on my subscription would be something like (say on > LSTOWN-L) > > MAIL FROM:<[log in to unmask]> Very close :-) It would actually be: OWNER-LSTOWN-L*Pete*2DWeiss**PSU*[log in to unmask] Since asterisks are not valid in a list name (but ARE valid in email addresses), LISTSERV knows that the list name is LSTOWN-L and the rest is the probe code. Note that sendmail can't handle probe addresses out the box (you have to patch it), and so probes are turned off by default on Unix versions of LISTSERV. Francoise