Buffer size MTA option

MTA enqueue buffering
The  MTA option sets the buffer size (for PMDF in blocks, as defined via the   MTA option; for the Messaging Server MTA,   is literally the number of bytes)  used when writing message files to the MTA&#x27;s queues (as well as when writing temporary files when   has been exceeded). The default value is 8192. The minimum allowed value is 512; the maximum allowed value is 512&#x2a;512=262144.

Note that this MTA option is completely different from the  TCP/IP-channel-specific option (which is instead  more closely analogous to  the   MTA option).

See also:
 * File format MTA options
 * block_size MTA Option
 * max_internal_blocks MTA Option
 * BUFFER_SIZE TCPIP-channel-specific option