title: Sending email with AWS SES without custom domain
body: <p>I would like to send email from a Rails 5.1 app with AWS SES through smtp, but without using a custom domain (it's ok if users receive emails with an address from aws). But when searching through AWS documentation or google, I can only find instructions to use custom domains.</p>
  
  <p>Is it possible? And if yes, what email address (mail FROM) should be used to replace the placeholder in <code>config/initializers/devise.rb</code>:</p>
  
  <pre><code>config.mailer_sender = 'please-change-me-at-config-initializers-devise@example.com'
  </code></pre>
  
  <p>?</p>