How to Change the Number of Messages Indexed by Postbox

By default, Postbox will index all message headers, but only the bodies of the last 50,000 most recent/frequently used messages. 

To change this value:

  • Open Config Editor.
  • In the text field at the top, search for mail.fulltextsearch.max_bodies
  • Change the value from 50000 to a value of your choosing. To index an unlimited number of message bodies set the hidden value to 0.
  • Restart Postbox.
  • Select Tools > Indexing > Index all messages.