-## Some magic lists used because `match_local_parts' and friends don't expand
-## their right-hand sides.
-localpartlist dom_users = ${expand:KV(users, {$value}{*})}
-localpartlist dom_locals = ${expand:KV(locals, {$value}{+user_extaddr})}
-localpartlist user_extaddr = ^CONF_user_extaddr_regexp
+## All of the `standard' local parts which ought to be provided by a domain.
+localpartlist required = postmaster : abuse