This property is used to specify the name or IP address of the client machine on which the Wrapper is running.
The value is used when sending EHLO command to the SMTP Server whenever an alert email should be sent.
The default value is the system hostname (which is the same as the value returned by the 'hostname' command run in a terminal).
Usually this property doesn't need to be modified.
Globally for all events: wrapper.event.default.email.client.host property, or
For a specific event: wrapper.event.<event_name>.email.client.host property.
The "<event_name>" component of the property name can be
either the keyword "default",
or one of the Event Types.
By setting the default property,
all Event Types which are not set explicitly will take on that value.