title: it is possible to read delegated email inbox from Google Apps Scripts?
body: <p>I allready have acccess (and also I am the administrator) of a delegated Inbox. I wanna run a Google Apps Script to read email from the delegated Inbox.</p>
  
  <p>Is that possible?</p>
  
  <p>It works with my main account, but not with the delegated one.
  I get a 403 => Delegation denied for xxxx@gmail.com</p>