Configure rails mailer

gistfile1.rb

  config.action_mailer.delivery_method = :smtp
  config.action_mailer.smtp_settings = {
  :address              => 'smtp.gmail.com',
  :port                 =>  587,
  :domain               => 'gmail.com',
  :user_name            => '',
  :password             => '',
  :authentication       => 'plain',
  :enable_starttls_auto => true
  }