As others have written, the "postmaster" is already an implicit owner of 
all lists.

You may have a couple of alternatives to the first  action:

First, don't do it.  Your time is too valuable to your employer for you 
to be looking at mailing list bounces.  Let Listserv get rid of the bad 
addresses (by enabling auto-delete).

Second, don't do it.  Listserv creates a small file for each list, one 
line for each subscriber where it understands the bounce format.  If you 
must make manual deletions, using these files will allow you to see most 
of the problems.

cheers, wayne

Tim Casten wrote, in part,  on 2007-05-31 5:29 PM:
> is there a quick email command to set all lists to errors to = postmaster
>
> also is there a quick way to add one email address to the owner of all lists.
>
> my owners are not doing a very good job in deleting bad addresses from their accounts as i have probing turned off along with auto delete.
>