title: How does Mandrill work?
body: <p>I just set up a Rails app to use Mandrill for sending notification emails (in development environment).  When I signed up for Mandrill, it used my gmail for a username and under the 'sending domain' it has gmail listed. Based on this (and not very comprehensive docs), I assumed that Mandrill would be sending the email <code>through my</code> gmail account. </p>
  
  <p><img src="https://i.stack.imgur.com/mnP4r.png" alt="enter image description here"></p>
  
  <p>In my Rails mailer Notifier.rb, I set the default mail address to a fake (i.e. non-existent) name</p>
  
  <pre><code>default from: "fakenotrealemail@gmail.com"
  </code></pre>
  
  <p>and when I received test emails from my Rails app using mandrill the emails were sent from 'fakenotrealemail@gmail.com'. Obviously that email address didn't send the emails because it doesn't exist. I'm not sure if Rails will always do that, or what Mandrill's role is.</p>
  
  <ol>
  <li>Anyways, if Mandrill's not using my real gmail address (that I signed up with) to send emails, then why is 'gmail' listed as a
  'sending domain.'</li>
  <li>Once I get the custom domain name for my app (once the app's launched) and sign up for Google business apps to get email with custom domain, is there anything I have to do to get Mandrill to use that? or is it just as simple as using that as the 'default' name in the Notifier.rb class of the Rails app?</li>
  </ol>