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Why do attachments show as Winmail.dat?

Posted on 2016-10-21
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Last Modified: 2016-10-21
When we receive emails from a company running SBS 2011, attachments come in as Winmail.dat. Other companies get the attachments without any difficulty. Why do we get winmail.dat?
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Question by:fightingASD
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Adam Brown earned 2000 total points
ID: 41854126
Because you are using a mail client that is not compatible with TNEF encapsulation. Exchange uses a special, proprietary formatting method for messages that can only be properly read by Outlook or another Exchange server. If you use Apple Mail, Thunderbird, or similar mail clients (or a web mail system that does not use Exchange), the TNEF encapsulated messages can't be read. https://msdn.microsoft.com/en-us/library/gg263346(v=exchsrvcs.149).aspx explains how to disable it for all domains or specific domains, but this is something that has to be reconfigured on the SBS 2011 server, so there isn't much you can do about it besides get outlook/exchange.
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Author Closing Comment

by:fightingASD
ID: 41854141
Perfect. That link allowed the sender to modify settings to never send RTF. Very impressed. Thanks.
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