Sending confirmation emails to registered users in ROR app via localhost

Question

In my ROR app, I am trying to send confirmation emails to my registered users when they signup, my website is on localhost currently. I am getting this error:

Answer 1

What version of Rails are you using?

Sending of email changed in version 3.2 (I believe)

http://api.rubyonrails.org/classes/ActionMailer/Base.html

Try:

UserMailer.registration_confirmation(@user).deliver