Transactionlimit, disconnecttransactionlimit Channel Options

SMTP transaction limit
The  channel option may be used to impose a limit on how many transactions (that is, messages) will be accepted during a single SMTP session (that is, connection). It is a channel analogue of the    TCP/IP-channel-specific option setting, which applies more generally to all incoming connections on all channels handled by the same Dispatcher SMTP service. After  is exceeded, additional attempts to submit messages (additional MAIL FROM: commands) will be rejected with an error response: 450 4.5.3 number of transactions exceeds allowed maximum The text in the above error message may be site-customized by using the (new in MS 6.3)   MTA option.

The  channel option causes the MTA to actually disconnect after the specified transaction limit is exceeded. Once the limit is reached, the MTA will issue an error response 450 4.7.0 Session transaction limit reached; disconnecting after the next MAIL FROM or RSET command, and then disconnect.

See also:
 * ALLOW_TRANSACTIONS_PER_SESSION
 * Typical TCPIP channels and servers
 * error_text_transaction_limit_exceeded MTA Option
 * SMTP and LMTP protocol channel options
 * Channel options