The outlook is opening these files in Protected View which is enabled by default Click on mail and calendar and Avanced options. but the it doesn't solve the problem Windows 10 Mail Not Opening Attachments - Solve Not I have followed the instructions in the tutorial. For the past 10 days it is not showing the attachments. Windows 10 Mail app was working fine till now. This tool helps with an in-depth analysis of emails I have the same problem. FreeViewer Windows Live Mail Viewer Windows Live Mail Viewer Software helps users to view all emails in detail with attachments like images, documents, PDFs. One of the technical glitches in Windows 10 Mail is cannot open email attachments.
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