When mapping table changes take effect

Changes to an MTA mapping table in general do not take effect until at a minimum the MTA configuration is reloaded; and if a compiled MTA configuration is in use, then the MTA configuration must be  recompiled prior to the reload. Performing a restart of processes  rather than a reload of the MTA configuration into already running processes is an alternative, though restarts of the  Job Controller  should be avoided (due to their disruptive effect on throughput) unless necessary.

See also:
 * Compiling the MTA configuration
 * cnbuild utility
 * reload utility
 * restart utility
 * Mapping tables
 * Job Controller
 * Dispatcher