See
.BR slocal (1)
for the details.
-.RE
-.PP
-.BR everyone :
-200
-.RS 5
-The highest user-id which should NOT receive mail addressed to
-\*(lqeveryone\*(rq.
-.RE
-.PP
-.BR noshell :
-.RS 5
-If set, then each user-id greater than \*(lqeveryone\*(rq that has a
-login shell equivalent to the given value (e.g., \*(lq/bin/csh\*(rq)
-indicates that mail for \*(lqeveryone\*(rq should not be sent to them.
-This is useful for handling admin, dummy, and guest logins.
.SS "File Locking"
A few words on locking:
.B nmh