The following table lists the threshold settings available for the Hub Transport Server category:
Threshold |
Description |
Value |
Aggregate Delivery Queue |
The Aggregate Delivery Queue holds the aggregate value of all of the messages queued for delivery in all of the queues associated with the Hub Transport Server. |
Default: 3000 messages |
Active Remote Delivery Queue |
The Active Remote Delivery queue holds messages that are being delivered to a remote server using SMTP. |
Default: 250 messages |
Active Mailbox Delivery Queue |
The mailbox delivery queue holds messages that are being delivered to a mailbox server by using encrypted Exchange RPC. |
Default: 250 messages |
Submission Queue |
A persistent queue that is used by the categorizer to gather all messages that have to be resolved, routed, and processed by Transport agents |
Default: 100 |
Active Non-SMTP Delivery Queue |
The Active Non-SMTP Delivery queue holds messages that are being delivered to a remote server, using a protocol other than SMTP. |
Default: 100 |
Retry Mailbox Delivery Queue |
The Retry Mailbox Delivery Queue holds messages with a status of Retry that are being delivered using encrypted Exchange RPC. Messages are given a status of retry when the server cannot connect to the next hop. |
Default: 100 |
Retry Non-SMTP Delivery Queue |
The Retry Mailbox Delivery Queue holds messages with a status of Retry that are being delivered using a protocol other than SMTP. |
Default: 100 |
Retry Remote Delivery Queue |
The Retry Mailbox Delivery Queue holds messages with a status of Retry that are being delivered using SMTP. |
Default: 100 |
Unreachable Queue |
The Unreachable queue is a persistent queue that contains messages that cannot be routed to their destinations. |
Default: 100 |
Largest Delivery Queue |
The Largest Delivery queue identifies the largest of all of the delivery queues on the Exchange server. |
Default: 200 |
Poison Queue |
The poison message queue is a special queue that is used to isolate messages that are detected to be potentially harmful to the Exchange 2007 system after a server failure. |
Default: 0 |