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Klammer allows you to open MSG and Winmail.dat files on your Mac and view their contents and attachments. All that business communication you could not view in the Mail application is now just a click away.


  • View MSG files
  • View Winmail.dat files
  • Access attachments, body and message details of the emails
  • Supports displaying rich-formatted message body
  • inline images, links, formatted text, tables and everything
  • Export to EML files, natively supported by Mac OS
  • Forward, forward as attachment or reply from the application
  • Quick Look attachments in MSG or Winmail.dat

What's New

Version 3.1:
  • Improved support for Korean charsets
  • Minor bugfixes


OS X 10.6.6 or later

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Klammer User Discussion

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4.8 2


Current Version (3.x)


Downloads 10,351
Version Downloads 4,073
License Commercial
Date 13 Feb 2013
Platform OS X / Intel 32
Price $9.99
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