title: retrospectively switch on emails for Jenkins jobs
body: <p>We have a Jenkins instance with over 250 jobs installed in it. Until recently corporate rules prevented us from configuring Jenkins to send emails for build failures etc.</p>
  
  <p>We have now been given permission to configure Jenkins to connect to the corporate SMTP server and I have configured one job to send emails and all is working fine. Is there an automated way to enable emails for all jobs or do I have to go into the configuration for each job and manually enable it?</p>
  
  <p>If not are there any plugins or shell scripts?</p>