* block limit priority limit MTA options

Size effects of message priority MTA options:  (integer),    (integer),    (integer),    (integer)
Note that as of the 8.0 release, these size-based priority override MTA option effects are nullified if the MT-PRIORITY SMTP extension has been used to set an explicit priority value.

The  MTA option may be used to instruct the MTA to downgrade the priority of messages based on size: messages above the specified size will be downgraded to lower than non-urgent priority, meaning that they will not be processed immediately and will wait for processing until the next periodic delivery run. The value is interpreted in terms of MTA blocks, as specified by the  MTA option. Note also that the   channel option may be used to impose such downgrade thresholds on a per-channel basis.

The  MTA option may be used to instruct the MTA to downgrade the priority of messages based on size: messages above the specified size will be downgraded to non-urgent priority. The Job Controller  automatically pays attention to message effective processing priority when scheduling delivery attempts. The value is interpreted in terms of MTA blocks, as specified by the  MTA option. Note also that the  channel option may be used to impose such downgrade thresholds on a per-channel basis.

The  MTA option may be used to instruct the MTA to downgrade the  priority of messages based on size: messages above the specified size will be downgraded to third class priority. The value is interpreted in terms of MTA blocks, as specified by the  MTA option. Note also that the   channel option may be used to impose such downgrade thresholds on a per-channel basis.

The  MTA option may be used to instruct the MTA to downgrade the priority of messages based on size: messages above the specified size will be downgraded to normal priority. The Job Controller automatically pays attention to message effective processing priority when scheduling delivery attempts. The value is interpreted in terms of MTA blocks, as specified by the   MTA option. Note also that the   channel  option may be used to impose such downgrade thresholds on a per-channel basis.

See also:
 * Processing priority MTA options
 * Message size MTA options
 * block_size MTA Option
 * nonurgentblocklimit Option
 * normalblocklimit Option
 * urgentblocklimit Option
 * secondclassblocklimit Option
 * Job Controller priority-based processing
 * mtpriority_policy MTA Option