While CommuniGate Pro employs many built-in techniques to prevent mail loops, in some situations (usually involving other servers) mailing loops still can occur. To minimize the damage caused by those loops, the Local Delivery Module counts all messages received by each Account. If this number exceeds the specified limit, the incoming messages queue for that Account is suspended. Note: The module counts the number of messages to be delivered to the Account, not the number of messages stored: even if an incoming message is not stored in the Account INBOX because an Account Rule has discarded it, the message is still counted.
The Account Mail Transfer Settings specify the incoming flow control limits for each Account.