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Measures reported by Exc2013SmtpSenTest
In Microsoft Exchange Server 2013, a Send connector controls the flow of outbound messages to the receiving server. Exchange 2013 Mailbox servers running the Transport service require Send connectors to deliver messages to the next hop on the way to their destination. Slow and error-prone connectors can therefore obstruct the timely delivery of mails to the end point. This is why, it is imperative that administrators identify such problematic connectors quickly, clear the bottleneck rapidly, and ensure that email delivery is not impeded in any way. This is where the Exc2013SmtpSenTest test helps.
This test auto-discovers the send connectors of the Transport service, and for each connector, reports the message load on that connector, reveals how well the connector handles the load, captures errors/failures experienced by the connector, and thus points administrators to those connectors that are unable to handle the load or are error-prone. In the process, the test enables administrators to figure out where email delivery is bottlenecked.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Byte_sent_sec |
Indicates the rate at which data was sent by this connector. |
KB/sec |
A high value over a period is indicative of an excessive use of the SMTP server. Under such circumstances, compare the value of this measure across send connectors to know which connector is contributing to the heavy load on the SMTP server. |
| Conn_cur |
Indicates the number of outbound connections from this send connector. |
Number |
The value of this measure indicates the connection load imposed by the send connectors of the Transport service on the next hop en-route to the destination. In the event of a connection overload, you may want to compare the value of this measure across send connectors, to know which send connectors have established the maximum number of connections. |
| Msg_sent_sec |
Indicates the rate at which messages are sent by this send connector. |
Msgs/Sec |
Compare the value of this measure across send connectors to know which send connectors are processing messages very slowly. In the event of a slowdown, this measure will lead you to the exact connector that could be contributing to the slowdown. |
| Conn_fail |
Indicates the number of connection failures currently encountered by this send connector. |
Number |
Ideally, the value of this measure should be 0. |
| Dns_err |
Indicates the number of DNS errors currently encountered by this send connector. |
Number |
Ideally, the value of this measure should be 0. |
| Protocol_err |
Indicates the number of protocol errors currently encountered by this send connector. |
Number |
Ideally, the value of this measure should be 0. |
| Socket_err |
Indicates the number of socket errors currently experienced by this send connector. |
Number |
Ideally, the value of this measure should be 0. |
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