Importer for Local Folders

We've improved the importer for local folders in Postbox 5. You can import a single folder or multiple folders in one step.

Importing Messages

Postbox can import mail folders in the .mbox file format. If your mail folders are structured in another format, please use export in the .mbox format or use a mail utility to convert mail file into .mbox format.

  1. Organized .mbox files to be imported within an enclosing file folder.
  2. Within Postbox, select Import from the File menu, and select the folder to be imported. 
  3. The folder will be imported under the On My Mac account (Mac) or Local Folders account (Windows).

Example: Importing Messages from Apple Mail

Now here's where things can get confusing in Apple Mail, so pay please pay close attention!

Single Folder
If you export just one folder, such as the Inbox, a single .mbox file will be saved to the desktop. Postbox's importer requires an enclosing file folder. So create a new folder, name it anything, then move the .mbox file into the file folder. Within Postbox, select the file folder to import, not the individual .mbox file.

Parent Folder - Collapsed
In Apple Mail, if you select a collapsed parent folder and then export, only the parent folder will be exported.

Parent Folder - Expanded
If you wish to export the parent folder and its subfolders, you must expand the parent folder, select the parent folder and all subfolders, then export. If a folder and a .mbox file is created on the Desktop, you must move both into a new file folder, then select the file folder for import within Postbox.


Remember, a .mbox file cannot be imported directly. It must be enclosed within a file folder, and it is the file folder that you import into Postbox.

If you have a large number of folders to import, we recommend structuring them all within a single folder in your existing email client, then exporting everything at the same time will be easier and faster.