At 15:07 01/29/2003 Wednesday, Jan A Bergeron VMD wrote:
>I know this has been discussed before, but this one has me stumped.  Based
>on past discussions, I have learned to ignore these mystery addresses, and
>most of them usually go away, but as you can see, this one is really
>persistent.
>_______________________________________________________
>
>      Err First Last  Address
>      --- ----- ----- -------
>      301 11/09 01/28 [log in to unmask]
>                 Last error: SMTP; 550 MAILBOX NOT FOUND


try these LISTSERV cmds

SCAN listname cs.com
SCAN listname d g o
SCAN listname 1722


If no credible matches, then I suggest one or more of:

1) turn off (=NO) auto-delete (and inspect the headers of
bounces);  return to normal after one day's (as in 24-h) posting

2) use an active (as opposed to passive) PROBE e.g.,

Renewal= 3-monthly,Delay(7),Probe

(there are various sub-parms that may be more suitable)

3) arrange with your LISTSERV admin to do a DISTRIBUTE MAIL job to each
subscriber

4) contact the [log in to unmask] enlisting his/her help in find out who
is sending aka forwarding to that address