Log debug MTA option

Debug MTA options:  (0 or 1)
RESTRICTED: The  MTA option may be used to enable  internal debugging of MTA logging activity, including  MTA transaction logging  and incrementing of the MTA channel counters;  it is intended for use by Oracle, and is not intended to be used by end sites.

See also:
 * Debug MTA options
 * Transaction logging MTA options
 * Counters MTA options