How to Close a Message Window on Delete Instead of Loading the Next Message

By default, Postbox will load the next message on delete when in a stand alone message window.  To change this behavior to close the window on delete:

  • Open Config Editor.
  • Enter mail.close_message_window.on_delete into the textbox.
  • Double-click the entry for mail.close_message_window.on_delete 
  • Change the value from false to true