How the size of the messages sent to the list can be limited?
To limit the size of the messages sent to the list:
(a) The value of the message size that could be sent including the attachment is entered at the field General Options> Additional settings > Maximum length in kilobytes (KB) of a message body. Use 0 for no limit in units of KB. If the value is zero (0) there would be no limit to the message size.