In Outlook itself, this file is decoded transparently and the messsage appears normal to the user (i.e. Secondly, to be honest I don't know all the circumstances that cause the problem I am about to solve, but if you have ever used Outlook as your mail client you are probably aware of the infamous winmail.dat.ĭependening on one of those annoyingly obscure configuration options and set on by default, when Outlook creates a message it stores all the text formatting information and any real attachments into a single attachment called winmail.dat. Firstly, I guess this isn't solely Mac specific and can actually help any email user as we will see, but Mac users would be an ideal target.
