What I usually do is first use the user-id part of the user's address to do a QUERY search. If that fails, then I GET the whole list. E.g., if [log in to unmask] is the mystery user, I'll do a QUERY listname FOR JOE*@* (notice the use of the two "*" wildcards). Often the true subscribed address has the same beginning characters as the bounced address you're trying to track down. If this fails, then I use GET to obtain all subscriber addresses, concealed and unconcealed. BTW, I believe the word LIST has to be in that GET command, e.g. GET PSYCHE-D LIST (NOLOCK ^^^^ -- Roger Burns [log in to unmask]