>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*@*
...
>If this fails, then I use GET to obtain all subscriber addresses,
...
>-- Roger Burns   [log in to unmask]
 
Just out of the sheer curiosity of it -- why not simply do a query listname
for *@* instead of a get?  What are the advantages / disadvantages?
 
Ignorantly yours,
 
Mario Rups
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