Mailbox Transport Submission Service Test

The Mailbox Transport Submission service connects to the local mailbox database using RPC to retrieve messages, and submits the messages over SMTP to the Transport service on the local Mailbox server, or on other Mailbox servers. If this service fails to submit messages to the transport service, then messages will not be delivered to their destinations, resulting in loss of critical business communication and related revenues. To avoid this, administrators can use the Mailbox Transport Submission Service test to monitor the submissions made by mailbox transport submission service and promptly capture permanent/temporary submission failures.

Target of the test : A Microsoft Exchange 2013/2016 server

Agent deploying the test : An internal agent

Outputs of the test : One set of results for the Exchange server being monitored

Configurable parameters for the test
  1. Test period - How often should the test be executed
  2. Host - The host for which the test is to be configured.
  3. port – The port at which the host listens.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

Failed submissions rate:

Indicates the rate at which submissions failed.


A high value for this measure is a cause for concern as it indicates frequent submission failures.  

Permanent failed submissions:

Indicates the percentage of permanent submission failures.


A very low value is desired for this measure.

Successful submissions rate:

Indicates the rate at which submissions succeeded.


A high value is desired for this measure.

Temporary submission rate:

Indicates the number of submissions per second that experienced temporary failures.


Ideally, the value of this measure should be low.