Microsoft Exchange 2000 Server Message Delivery
The Message Delivery Dialog Box with four tabs as shown below can be displayed by right clicking on "Message Delivery" under "Global Settings" and selecting "Properties".
Message Delivery Properties
This is where maximum size of sent and received messages can be set. Also the number of recipients for each message can be limited. These settings are global and include all virtual servers even though message size may also be limited in each virtual server.