def deployment_notification(capistrano)
        presenter = Presenter.new(capistrano)
        
        content_type "text/plain"
        from         presenter.from
        recipients   presenter.recipients
        subject      presenter.subject
        body         presenter.body
      end
def deployment_notification(capistrano)
        presenter = Presenter.new(capistrano)
        
        content_type "text/plain"
        from         presenter.from
        recipients   presenter.recipients
        subject      presenter.subject
        body         presenter.body
      end
Grab the options for emailing from capistrano[:cap_gun_email_envelope] (should be set in your deploy file)

 Valid options:
     :recipients     (required) an array or string of email address(es) that should get notifications
     :from           the sender of the notification, defaults to cap_gun@example.com
     :email_prefix   subject prefix, defaults to [DEPLOY]