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SMTP Service

The Simple Mail Transfer Protocol (SMTP) test monitors the status of the SMTP process on a network device. SMTP is the standard Internet host-to-host email transport protocol. Typically, you use SMTP to send your email to a POP3 server, where the recipient retrieves the message.

MSP N-central can determine the up or down status of the SMTP service. The SMTP service does not use the Warning state. MSP N-central averages the availability of the SMTP service over the scan interval. It compares the availability of the SMTP service to the threshold to determine the status.

Service Type

TCP

Instances on a Device

1

Device Class

Server - Generic, Workstation - Generic, Other, Printer, Scanner/Camera, Switch/Router, Laptop - Windows, Server - Windows, and Workstation - Windows

Monitored By

Windows Probe, Central Server

Scan Interval

15 minutes

Timeout Value

The time (in seconds) that the MSP N-central server waits before considering the test a failure. The default is 30 seconds.

Port Number

25

Validation String

The response you expect to receive from the queried port. If the queried port does not return the validation string that you specify, the service transitions to a Failed state.

The default validation string is 220.

Status Details

Status Detail

Description

SMTP Service Availability

MSP N-central determines whether the SMTP service is up or down. The SMTP service does not use the Warning state. MSP N-central averages the availability of the SMTP service over the scan interval and compares the availability of the SMTP service to the threshold to determine the status.

Round Trip Time (ms)

The time for a request to be sent and received.

DNS Resolution

The threshold that determines whether the device name can be resolved.

If an FQDN has been specified, the service searches for its IP address. If the IP address is found, the state will be Normal. Otherwise, it will be Failed, based on the default settings.

If an IP address has been specified, the service checks only the IP address's format. If the format is correct, the state will be Normal. Otherwise, it will be Failed, based on the default settings.