ActionMailer not sending mail in development Rails 4

Question

Why is this mailer not sending any mail? (Or any ideas for debugging?)

In my_app/config/environments/development.rb I have this code:

  config.action         


        

Answer 1

For anyone not using smtp, switching the delivery method to sendmail helped me in addition to explicitly setting deliveries to be performed:

config.action_mailer.delivery_method = :sendmail