Letter Opener

The winmail.dat solution

Letter Opener for macOS Mail

Letter Opener for macOS Mail seamlessly and automatically converts winmail.dat files right inside your OS X Mail application. With Letter Opener Pro the attachments appear like any others!

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Letter Opener Lite

With Letter Opener Lite open the occasionally winmail.dat attachment with just one double-click!

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Letter Opener Mobile

Get full-featured winmail.dat viewing power for iPhone & iPad that doesn't feel like you left some important features back at the office.

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DockStar adds extra badges to Mail's dock icon and clickable indicators to the menu bar. Intuitively monitor unread messages in more than one mailbox.

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El Capitan 10.11.6 ready version for Letter Opener Pro and DockStar is available.

July 18, 2015

Following the release of OS X El Capitan 10.11.6, we are happy to provider our customers a version compatible with OS X El Capitan.

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