INFRA-1743 Activate C4 email notifications Open source and Ent

.ci/dev/regression/Jenkinsfile

@@ -382,6 +382,22 @@ pipeline {
                 }
             }
         }
+        failure {
+            script {
+                def statusSymbol = '\u274c'
+                if (isReleaseTag || isReleaseBranch || isReleaseCandidate) {
+                    emailext subject: "$statusSymbol " + '$PROJECT_NAME - Build # $BUILD_NUMBER - $BUILD_STATUS!',
+                            body: '${SCRIPT, template="groovy-html.template"}',
+                            recipientProviders: [
+                                    [$class: 'CulpritsRecipientProvider'],
+                                    [$class: 'RequesterRecipientProvider']
+                            ],
+                            mimeType: 'text/html',
+                            replyTo: '$DEFAULT_REPLYTO',
+                            to: "adel.el-beik@r3.com"
+                }
+            }
+        }
         cleanup {
             deleteDir() /* clean up our workspace */
         }