Open winmail.dat files

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Winmail.dat Premium: Access to attachments in winmail.dat files
ZIP Premium: Access to attachments in ZIP archives

What is a winmail.dat file?

Winmail.dat files contain email messages from Microsoft Outlook. Since iPhones, iPads, iPod touch devices and Macs can’t read them natively, users have to rely on third-party software such as Letter Opener to convert and open them.

What is a ZIP file?

A ZIP file may contain one or more compressed files or directories. Letter Opener can open ZIP files and give access to the files inside.


It just works

I have been using this app for years. Opens up when needed and quickly converts .dat files. Highly recommended!


Always opens PC to Mac attachments! Very useful for our firm’s technology mix.

Very easy to use

Opens winmail.dat attachments effortlessly to recover attachments within
Mr. Zinc

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Letter Opener for macOS
Open Winmail.dat, MSG and XPS files with just a simple double-click!
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Letter Opener for macOS Mail
Automatically converts and displays winmail.dat files in your macOS Mail app.
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