title: Allow Jenkins to send email to non registered users
body: <p>My Jenkinsfile looks like:</p>
  
  <pre><code>try {
  
        sh 'exit 1'
  
        stage("Test") {
           sh "node -v"
           sh "npm prune"
           sh "npm install"
           sh "npm test"
        }
        ...
  
    } catch(e) {
      currentBuild.result = 'FAILURE'
      emailext(body: '${DEFAULT_CONTENT}', mimeType: 'text/html',
               replyTo: '$DEFAULT_REPLYTO', subject: '${DEFAULT_SUBJECT}',
               to: emailextrecipients([[$class: 'CulpritsRecipientProvider'],
                                       [$class: 'DevelopersRecipientProvider'],
                                       [$class: 'RequesterRecipientProvider']]))
      throw e
    }
  </code></pre>
  
  <p>I want to send email only on build failures.
  I receive following :</p>
  
  <blockquote>
    <p>Not sending mail to unregistered user my_primary_github_email@gmail.com</p>
  </blockquote>
  
  <p>Actually, I have 2 questions.</p>
  
  <ol>
  <li>Is there way to allow sending emails to unregistered users?</li>
  <li>Is there way to configure Jenkins to send email to recipient address configured for that repository organization?
  For example:
  I have 2 emails configured in Github, primary email and secondary email, the second configured to receive emails for organizations`s repositories.
  So if the build belongs to organization, I want Jenkins to send email to address configured for that organization and not to primary address.</li>
  </ol>