Backup Microsoft Outlook to .msg files
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Kooltou: the MS Outlook Email Backup Tool

This is a tool for backing up Outlook emails to .msg files.

It has been tested with Outlook 2010.


  • Download

    • Latest version: v0.0.6.
    • The program itself. Download and run this.
    • Does not require installation, therefore does not require elevated rights ("administrator rights").
  • Documentation

    • Describes features, instructions for using the software, and troubleshooting tips.


  • Package requirements:
    • easygui
    • pytz
    • pywin32 (pip package pypiwin32)
    • unicodedata
  • Build procedure: pyinstaller --onefile ./

Version History

  • v0.0.6 - 2015-10-02
    • Fix bug with long filenames and long folder paths, exceeding Windows' 255 character path limit.
  • v0.0.5 - 2015-07-07T04:49:02.813000
    • Fix rare crash bug when MailItem doesn't have a ReceivedTime.
  • v0.0.4 - 2015-07-06T14:52:37.177000
    • Add some error handling for the case where folder creation fails (i.e. due to not having admin rights.)
    • MD5: 74E22DC415D23EC62150940FF90E6DFF ./dist/kooltou.exe
  • v0.0.3 - 2015-07-06T14:31:47.419000
    • Fix bug where saving to a folder like F:\Backups\Email instead tries to save to F:\.
    • MD5: C59C6E4AB72F86CCA6FA86A167BFB3C8 kooltou.exe
  • v0.0.2 - 2015-07-06T13:04:19.370000
    • Fix bug where 'Saved as MSG' tag was not being applied to emails.
    • Add option for whether to apply Saved as MSG tag or not.
    • MD5: 57C640AD3F1893AE8B7BDDE9B69A5E73 kooltou.exe
  • v0.0.1:
    • MD5: 829278429742826A0699F1DA1EFA9972 kooltou.exe


Free software under the MIT license. See LICENSE.txt.