I have a couple of Outlook .pst files that I want to convert to some other format, preferably Maildir or MH.

Both readpst and pffexport produce strange incorrect output. For example, there is a sequence A B C that I recognise and that might be the title of an email or a folder (cannot remember), but in the output it becomes nested file folders


Some folders are empty, most of the actual mail folders are sub-folders of the Inbox in the output, whereas originally I had no nested folders at all, and so on. Very unsatisfactory.

  • if you still have a windows-machine with outlook installed use it and Thunderbird to import your messages into Thunderbird. - depending on your settings, Thunderbird uses mbox or Maildir as internal format in its profile folder. Mar 29, 2019 at 8:23

1 Answer 1


You don't mention the OS for the software, but for Windows, you can try PST to Maildir Converter, available here free:


  • Thanks for the suggestion but this does not seem to be free, and also it displays the same problem with the incorrect structure. I'm beginning to think maybe my files were messed up when they were created.
    – Tomas By
    Nov 29, 2017 at 13:50

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