Tracking debug MTA option

Debug MTA options:  (0-10)
RESTRICTED: The  MTA option is used to enable debug output from the MTA&#x27;s tracking subsystem. The default value of 0 disables debug output; positive values enable it. The larger the value, the more output is produced.

See also:
 * tracking_mode MTA Option
 * Debug MTA options
 * Message tracking MTA options