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Ruby on Rails

This example shows how to send an email for user signups.

Setup ActionMailer

Let’s generate a Mailer class. Mailer classes function as our controllers for email views.

$ rails generate mailer UserNotifier

Now we open up the mailer we’ve just generated, app/mailers/user_notifier.rb and add a mailer action that sends users a signup email.

class UserNotifier < ActionMailer::Base
  default :from => ''

  # send a signup email to the user, pass in the user object that   contains the user's email address
  def send_signup_email(user)
    @user = user
    mail( :to =>,
    :subject => 'Thanks for signing up for our amazing app' )

Now we need a view that corresponds to our action and outputs HTML for our email. Create a file app/views/User_notifier/send_signup_email.html.erb as follows:

<!DOCTYPE html>
    <meta content='text/html; charset=UTF-8' http-equiv='Content-Type' />
    <h1>Thanks for signing up, <%= %>!</h1>
    <p>Thanks for joining and have a great day! Now sign in and do
awesome things!</p>

If you don’t have a user model quite yet, generate one quickly.

$ rails generate scaffold user name email login
$ rake db:migrate

Now in the controller for the user model app/controllers/users_controller.rb, add a call to UserNotifier.sendsignupemail when a user is saved.

class UsersController < ApplicationController
  def create
    # Create the user from params
    @user =[:user])
      # Deliver the signup email
      redirect_to(@user, :notice => 'User created')
      render :action => 'new'

Alright, now we’re cooking! Let’s get it all going through Mail250.

In config/environment.rb specify your ActionMailer settings to point to Mail250’s servers.

ActionMailer::Base.smtp_settings = {
  :user_name => 'mail250_username',
  :password => 'mail250_password',
  :domain => '',
  :address => '',
  :port => 2525,
  :authentication => :plain,
  :enable_starttls_auto => false

That’s it! When a new user object is saved, an email will be sent to the user via Mail250.

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