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

All of these answers are great, but there is another place where you can get burned, especially in the context of debugging.

In development.rb make sure you set config.action_mailer.raise_delivery_errors = true

If your .deliver method seems to be working without issue, but you never actually receive the email across the wire, your delivery method may be throwing an exception and rails is swallowing the error. This is very true if you simply have something as simple as a misconfigured credentials, or an aws access denied API error. Save ripping your hair out and make sure you have raise_delivery_errors turned on. It wants to tell you something but can't.