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 or 2010 system after a server failure.

Default: 0