title: How can i use GMailApp to access to user's domain account
body: <p>I need to know how to use the object <a href="https://developers.google.com/apps-script/reference/gmail/gmail-app" rel="nofollow">GmailApp</a> from Google Apps Script to access to different user inboxes of the same domain. Is it possible? How?</p>
  
  <p>Thanks in advance,
  Ernesto.</p>