How to configure the email alert (SMTP config) while exit 2 code (error occured) for service check

I Created a simple service check bash script in all the agents in /opt/sensu/ path
service check script is an example to test the SMTP config for exit code

#!/bin/bash

# Check if nginx service is running
if systemctl is-active --quiet nginx; then
    echo "nginx service is running"
    exit 0  # Exit with status code 0 indicating OK
else
    echo "nginx service is not running"
    exit 2  # Exit with status code 2 indicating Critical
fi

from workstation i apply below yaml for creating checks and add the email-handler for sending the alerts to email

sensuctl create -f nginx_check.yml

api_version: core/v2
type: CheckConfig
metadata:
  name: nginx-check
  namespace: default
spec:
  command: "/opt/sensu/nginx_check.sh"
  subscriptions:
    - system_test
  interval: 5
  publish: true
  handlers:
  - email-handler

then i created email_handler.yaml for the same

sensuctl create -f email_handler.yaml

api_version: core/v2
type: Handler
metadata:
  name: email-handler
  namespace: default
spec:
  type: pipe
  command: "sensu-email-handler --authMethod 'none' \
--mail-from='xxxx@xxxxx.com' --mail-to='yyyy@yyyyy.com' \
--smtp-address='xx.xx.xx.xx' --smtp-port=25"
  timeout: 5
  runtime_assets:
    - email-handler

and added the plugins

sensuctl asset add sensu/sensu-email-handler -r email-handler

so can anyone tell me what addtional steps needs to be done in agent or workstation or in backend for the same
any