title: Multiple values for one field in comma-separated values .csv format
body: <p>Is it possible to have multiple values under the same field in a .csv file?</p>
  
  <p>I have an "email" field on my webpage, and the user may optionally type in multiple addresses. I want my .csv file to be able to handle an arbitrary number of "email" values. How can I achieve this? The .csv is read by a third party program which I cannot modify.</p>