send email on master node

Former-commit-id: 33fe31f8254b5ab2cc7a99e4b903a16730030f71

ci/main_jenkinsfile

@@ -234,12 +234,20 @@ spec:
     post {
         always {
             script {
-                node {
-                    def notify = load "${env.WORKSPACE}/ci/jenkinsfile/notify.groovy"
-                    notify.notify()
+                if (!currentBuild.resultIsBetterOrEqualTo('SUCCESS')) {
+                    // Send an email only if the build status has changed from green/unstable to red
+                    emailext subject: '$DEFAULT_SUBJECT',
+                    body: '$DEFAULT_CONTENT',
+                    recipientProviders: [
+                        [$class: 'DevelopersRecipientProvider'],
+                        [$class: 'RequesterRecipientProvider']
+                    ],
+                    replyTo: '$DEFAULT_REPLYTO',
+                    to: '$DEFAULT_RECIPIENTS'
                 }
             }
         }
+
         success {
             script {
                 updateGitlabCommitStatus name: 'CI/CD', state: 'success'