Microsoft Exchange Server 2013: Connectivity, Clients, and UM

Message throttling

Email servers that act as the gateways to large companies can be overwhelmed or swamped by large volumes of incoming messages. The servers can either attempt to deal with the volume the best they can and eventually work through the backlog that inevitably accumulates, or the software can monitor, recognize, and take action to manage the condition to maintain an orderly processing regime. Message throttling is the mechanism Exchange 2013 uses to manage peaks in incoming message traffic. Unlike other Exchange 2013 throttling mechanisms, which aim to prevent ill-behaved clients from consuming large quantities of system resources without good reason, message throttling applies only to SMTP message flow through the Exchange 2013 ...