Return verify MTA option

Debug MTA options: (0 or 1)
The  MTA option was introduced in MS 7.0.5, in place of the former MTA Tailor option. When the  MTA option is set to 1,  shell script logging, , will be enabled within the   shell script.

See also:
 * MTA Tailor options
 * Scheduler task options
 * Notification message MTA options
 * Debug MTA options