Implement a basic Ruby on Rails application that sends mail using the Paubox SMTP Server

Open a terminal window

1. CD to a directory where you would like to store your simple use Web API application
2. To create the rails application, run the command:
   rails new basic-paubox-web-api
3. Run command:
   cd basic-paubox-web-api
4. Run command:
   rails generate mailer UserMailer
5. Open the application in a text editor of your choice and open the app/mailers/user_mailer.rb file

6. In the file, paste the following, be sure to use the same email address that we have given the customer:

   class UserMailer < ApplicationMailer
   default from: 'CUSTOMER_USERNAME@api.paubox.com'

     def welcome_email(email)
       mail(to: email, subject: 'Hello')
     end
   end

7. Save and close the file

8. Run command:
   touch app/views/user_mailer/hello_email.html.erb

9. Open the hello_email.html.erb file in your text editor
10. Copy and paste the following:
    <h1>Hello</h1><p>You have successfully received a Paubox encrypted email</p>
11. Save and close the file
12. Open the file config/application.rb

13. below this line`config.active_record.raise_in_transactional_callbacks = true`, paste the following, be sure to use the username and password that was given to the customer:

    config.action_mailer.delivery_method = :smtp
    config.action_mailer.smtp_settings = {
      :address => "api.paubox.com",
      :port => 587,
      :user_name => "CUSTOMER_USERNAME@api.paubox.com",
      :password => "GIVEN_PASSWORD",
      :enable_starttls_auto => true,
    }

14. Save and close the file
15. In the terminal window, run the command:
    rails console
16. In the rails console, run the command:
    UserMailer.hello_email('email_address_to_send_test_email_to').deliver_now
17. Go to the inbox for the email_address_to_send_test_email_to and look for the Hello email.
18. When you receive it, the email should look like below and it should be encrypted by Paubox