Sending email via Gmail SMTP

Mail.defaults do
  delivery_method :smtp, { 
    :address => 'smtp.gmail.com',
    :port => '587',
    :user_name => ENV['GMAIL_SMTP_USER'],
    :password => ENV['GMAIL_SMTP_PASSWORD'],
    :authentication => :plain,
    :enable_starttls_auto => true
  }
end