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• WINMAIL.DAT Instructions to turn off sending files in TNEF format from Outlook. WINMAIL.DAT is a proprietary Outlook file that allows Outlook users to send Transport Neutral Encapsulation Format (TNEF) information. TNEF information is unopenable and irrelevant outside of Outlook.

Last modified 18 years ago on 2008-03-02 11:37 PM UTC.
Created 22 years ago on 2004-02-27 04:17 PM UTC.