Product Documentation

Monitoring SMTP Services

Aug 31, 2016

The NetScaler appliance has one built-in monitor that can be used to monitor SMTP services: the SMTP monitor. It periodically checks the SMTP service to which it is bound by opening a connection with it and conducting a series of handshakes to ensure that the server is operating correctly. If the SMTP service completes the handshakes properly, the monitor marks the service UP. If the SMTP service does not respond, or responds incorrectly, it marks the service DOWN.

Note: Monitor probes originate from the NetScaler IP (NSIP) address.




User name SMTP server. This user name is used in the probe.


Password used in monitoring SMTP servers.


The path and name of the script to execute.


The IP Address of the dispatcher to which the probe is sent.


The port of the dispatcher to which the probe is sent.

To configure the built-in SMTP monitor, see Configuring Monitors in a Load Balancing Setup.