winmail.dat is no longer converted properly and the contents are no longer displayed as attachments · Issue #85 · TB-throwback/LookOut-fix-version · GitHub
Open Winmail.dat in Thunderbird - Import Winmail.dat File to Thunderbird
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Open Winmail.dat in Thunderbird - Import Winmail.dat File to Thunderbird
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Letter Opener for macOS – the easiest way to open Winmail.dat, MSG and XPS files