Log intermediate MTA option

Transaction logging MTA options:  (0-63)
(New in MS 6.2.) The  MTA option controls the inclusion of the "intermediate" form of the destination address, and the inclusion of the "original" (RCPT TO) form of the destination address, in  MTA message transaction log  records. The option takes a bit-encoded integer value.

See also:
 * Transaction logging MTA options
 * MTA transaction log entry format
 * log_format MTA Option
 * Triggering effects from transaction logging with LOG_ACTION
 * log_priority MTA Option
 * log_filter MTA Option