As part of my management technique that involves NOMAIL, when I
decide to inhibit mail to a user because of bounces, I set them
to NOMAIL NOPOST.  This is useful for distinguishing between
"vacation"/alt-address types (NOMAIL), and "bouncers" (NOMAIL and
NOPOST).
 
Given sufficient time, I can do a:
 
Q listname WITH NOMAIL NOPOST FOR *@*
 
to be followed up by a cleanup via a QUIET DEL.
 
Works for me, your mileage may vary.
 
/Pete Weiss -- Penn State