diff --git a/Jenkinsfile b/Jenkinsfile
index fdc2488..e71a2c7 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -15,6 +15,12 @@ pipeline {
           def userInput
           try {
             timeout(time: 15, unit: 'SECONDS') {
+              // TODO: e-mail notification
+              // https://stackoverflow.com/questions/52093926/jenkins-pipeline-send-email-at-user-input
+              // https://www.jenkins.io/doc/pipeline/steps/workflow-basic-steps/#mail-mail
+              // Entweder: ${env.BUILD_URL}
+              // Oder: http://{{jenkins_uri}}/blue/organizations/jenkins/${env.JOB_NAME - ohne /Branch}/detail/${env.BRANCH_NAME}/${env.BUILD_ID}/pipeline/${env.BUILD_ID}
+              mail to: 'devel@zwackl.de'
               userInput = input(
                 id: 'approve_deploy_at_prod',
                 ok: 'Yepp, go on!',