Min value: 1
Max value: 1000
Default value: 50
Type: Message count
E-mail messages are queued internally for up to a minute and then sent in bulk. This means only a single connection to the SMTP server is required. Each message is sent separately, and then the connection to the server is closed.
The MailMaxMessageSend value specifies the maximum number of messages that are sent per minute. Any messages not sent will be re-queued until the next e-mail send a minute later.
This option can be useful when a lot of e-mail messages are being sent via an SMS gateway which has a limit on message sending. It can also reduce the load on a mail server and spread the message load out over a few sending intervals.