SMTP service

The SMTP service 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.

N-able N-central can determine the up or down status of the SMTP service. The SMTP service does not use the Warning state. N-able 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 N-able 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	N-able N-central determines whether the SMTP service is up or down. The SMTP service does not use the Warning state. N-able 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.

Status Detail

Description

SMTP Service Availability

N-able N-central determines whether the SMTP service is up or down. The SMTP service does not use the Warning state. N-able 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.