At 13:16 02/12/1999 Friday -0500, you wrote:
|Thanks for all the tactics, Uzi and others.  I usually wait a few days too,
|but after I get permanent failure messages for three days in a row, they
|are removed, quietly.

One of the advantages of non-quiet delete is that it notifies any other
list-owners via the list definition keyword * NOTIFY=  (of course you
could CC: them on the DELETE mail itself).