What to do with subscribers who bounce is a matter of list-owner
experience and patience.
To find those subscribers who are currently not receiving email:
Q listname WITH NOMAIL FOR *@*
Of course some subscribers might be on vacation and/or read the postings
through the WEB interface (if available) and not because you have
suspended them.
What *we* like to do (on a particular listname) when we do suspend them is
SET listname NOMAIL NOPOST FOR bouncer@host
This methodology assumes that we do NOT usually set a normal subscriber
to MAIL NOPOST. Thus, this combination of NOMAIL NOPOST tells *me* that
we have suspended the user. Thus a
Q listname WITH NOMAIL NOPOST FOR *@*
output IS indicative that one of the list-owners saw fit to suspend the
subscriber who is NOT on vacation/WEB-only user.
One of the pleasant side-effects is that the subscriber can not then send
a nastygram to listname complaining about why they aren't receiving mail
(or otherwise send a "test" message).
YMMV.
/Pete