Though only a list-owner (or maintainer) can do the SET
POST/NOPOST, that operation is different from being
SERVED out. There are two kinds of SERVE OUT: one done
implicitly by LISTSERV when too many "bad" commands are
received from the user, and the other by the LISTSERV
maintainer. The former can be restored by any other
e-mail userid by sending the following command to the
host's LISTSERV
SERVE userid@node
The latter kind of SERVED out can only be restored by
the LISTSERV maintainer.
Finally, there is a third kind of list inhibition:
the list's keyword FILTER=
/Pete Weiss at Penn State