if it is not enough, look for clues in log files in railsapp/log
making sure you check logs relevant to mode you run your app, eg.
if there’s nothing there you need to configure your railss application
to send mails and report errors.
My railsapp/config/environments/development.rb also has following
config.action_mailer.raise_delivery_errors = true
config.action_mailer.perform_deliveries = true
config.action_mailer.delivery_method = :sendmail ####
As regards delivery_method it might be different on your system if you
don’t have email server installed on it.
You can find documentation how to configure rails to use googlemail,
so it should be easy to adapt it to your needs
Hope it helps.