Jets Rails Email Previews

Rails supports previewing emails from localhost:3000/rails/mailers. This can be enabled with:

config/environments/development.rb:

Rails.application.configure do
  config.action_mailer.show_previews = true # default: false
end

Previewing Emails

Here’s an example showing how to use email previews.

rails new demo
cd demo
rails generate migration create_users name:string
rails db:migrate
rails generate mailer UserMailer new_user

Then create a preview model with a naming convention in the app/previews folder like so.

app/previews/user_mailer_preview.rb

class UserMailerPreview < ActionMailer::Preview
  def new_user
    UserMailer.new_user
  end
end

To see the email preview visit: localhost:3000/rails/mailers/user_mailer/new_user. You should see something like this:

In this section: