KillerDesigner
10/22/2013 - 10:53 PM

gistfile1.rb

gistfile1.rb
content_copyfile_download
rails g UserMailer 

class UserMailer < ActionMailer::Base
  default from: "fred@fred.com"

   def confirm_user(user)
    @user = user
    @url  = 'http://fred.com/login'
    mail(to: @user.email, subject: 'Welcome to Fred Site')
  end
end

Text version of greeting email (in views/UserMailer/welcome_email.text.erb )
Welcome to example.com, <%= @user.name %>
===============================================
 
You have successfully signed up to example.com,
your username is: <%= @user.login %>.
 
To login to the site, just follow this link: <%= @url %>.
 
Thanks for joining and have a great day!

HTML version (in views/UserMailer/welcome_email.html.erb)
<!DOCTYPE html>
<html>
  <head>
    <meta content='text/html; charset=UTF-8' http-equiv='Content-Type' />
  </head>
  <body>
    <h1>Welcome to example.com, <%= @user.name %></h1>
    <p>
      You have successfully signed up to example.com,
      your username is: <%= @user.login %>.<br/>
    </p>
    <p>
      To login to the site, just follow this link: <%= @url %>.
    </p>
    <p>Thanks for joining and have a great day!</p>
  </body>
</html>

Then the configuration files:
for local testing in config/environment/development.rb put something like this:
config.action_mailer.delivery_method = :sendmail
# Defaults to:
# config.action_mailer.sendmail_settings = {
#   location: '/usr/sbin/sendmail',
#   arguments: '-i -t'
# }
config.action_mailer.perform_deliveries = true
config.action_mailer.raise_delivery_errors = true
config.action_mailer.default_options = {from: 'no-replay@example.com'}

You will use the config/environment/production.rb file for deployment to Heroku, and 
use the environment variables suggested by SendGrid, or whoever you choose for your
3rd party mailer service.