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This article describes how either an Exchange Server administrator or end users can prevent the Winmail.dat attachment from being sent to Internet users when using the Microsoft Exchange Internet Mail Connector (IMC).When an end user sends mail to the Internet...

On a Mac, to convert a winmail.dat file into the original format is to download the free program called “TNEF’s enough”. Alternatively, there is a paid OS X Mail plugin available called “Letter opener” which will automatically decode the attachment still in M...