title: Couldn't send email in Redmine
body: <p>I try to send email in Redmine with sendmail method, but I don't receive any email. 
  Therefore, I tried configuring smtp email setup in Redmine using the following parameters, but I get the error "An error occurred while sending mail (execution expired)".</p>
  
  <pre><code>production:
    email_delivery:
      delivery_method: :smtp
      smtp_settings:
        address: "box784.bluehost.com"
        port: 465
        authentication: :plain
        user_name: "username+domain.com"
        password: password
        enable_starttls_auto: true
  </code></pre>
  
  <p>my Information:</p>
  
  <pre><code>Environment:
    Redmine version                          2.1.4.stable
    Ruby version                             1.8.7 (x86_64-linux)
    Rails version                            3.2.8
    Environment                              production
    Database adapter                         MySQL
  Redmine plugins:
    no plugin installed
  </code></pre>