Limit the Number of Messages Per Connection
This option enables you to limit the number of messages sent in a single connection. It also provides a method for improving system performance by allowing the use of multiple connections to deliver messages. Once the set limit is reached, a new connection is automatically opened and the transmission continues until all messages are delivered.
For example, if you frequently send a large number of messages to certain remote servers, you can set the Limit number of messages per connection to value to a relatively small number, such as 20. As a result, when sending 100 messages in one session, SMTP will divide the messages into five groups of 20, and then open five connections to send them simultaneously. Message delivery, therefore, takes less time.
To limit the number of messages sent in one connection: