On Fri, 5 Jul 1991 07:48:22 EDT Jim Ennis said:
>that I can think to do is to place the list on HOLD when I am not
>>>--- Errors encountered in recipients ---
>>>No such mail name "gbisaga" exists.
 
Since the "erroneous recipient" didn't show in the distributed mail you'd need
to catch  one of the mailings  before it gets distributed.  Maybe there's some
information in the headers. Then ask again ...
 
Christian