What is a .MS-TNEF file?
The file extension .MS-TNEF stands for MS Transport Neutral Encapsulation Format. This type of file is sometimes created by Microsoft email applications, like Outlook. It contains an email message saved in a special format known as TNEF, which is specific to Microsoft. However, this format can cause issues when the email is opened in non-Microsoft email programs. In such cases, the email might not display correctly and could show the text "application/ms-tnef" instead. This text represents the MIME type used for formatting emails in Microsoft Exchange.
To open a .MS-TNEF file, you can use Microsoft Outlook 365, which is available on various platforms. Apple Mail, which comes pre-installed on macOS operating systems, can also open this type of file. Additionally, newer versions of Microsoft Outlook (365 and later) are equipped to handle .MS-TNEF files. These programs can properly interpret the file's format, allowing you to view the email message as intended.
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