Max header block use, max header line use MTA options

The  MTA option controls what fraction of the available message blocks can be used by message  headers. The default is 0.5.

This MTA option is used to fine-tune the message fragmentation effect of the  channel option.

The  MTA option controls what fraction of the available message lines can be used by message headers. The default is 0.5.

This MTA option is used to fine-tune the message fragmentation effect of the  channel option.

See also:
 * Message size MTA options
 * maxblocks Option
 * maxlines Option
 * block_size MTA Option