The emails are from inside a domain to an external email address.
On Premise Exchange 2010 server.
Office 2012, Office 2013
The latest Symantec End Point Antivirus
I've tried all kinds of solutions but nothing fixes the problem. I send an attachment (doc, docx, txt, pdf, etc). When the recipient (gmail, Hotmail, etc) receives it the original attachment is no longer attached and in it's place was winmail.dat
I know there are lots of solutions on the web but none that I've tried a lot and none seem to work.