How to Prevent Postbox from Downloading Message Bodies for Offline Usage
By default, Postbox will download and store message bodies for offline usage when you read messages or fetch them during indexing. This makes displaying messages and re-indexing faster.
To disable this feature:
- Open Config Editor.
- Enter mail.server.default.should_store_msg_offline into the textbox.
- Double-click the entry for mail.server.default.should_store_msg_offline to change the value from true to false.