Cisdem WinmailReader for Mac can open winmail.dat files and save the attachment. You can double-click to check the message and the attachment, or drag-and-drop to open multiple files, or use it as QuickLook to preview the attachment.
Winmail.dat files are in fact TNEF format (Transport Neutral Encapsulation Format) sent from the senders who are using Microsoft Windows Outlook (1997, 2000, 2003, 2007, 2010) or Microsoft Exchange.
Winmail Opener is a small and simple utility that allows you to view and extract contents of TNEF-encoded messages (infamous winmail.dat). Winmail Opener can decode and show RTF message text and all embedded attachments, has full drag-and-drop support and supports command line...
Open Winmail.dat, MSG and EML files. A new way to seamlessly view e-mail files without requiring an App download.
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