I have windows user send email using outlook, with an attachment, a .docx document to a person that uses a MAC computer. When the MAC user receives the email, the attachment is a winmail.dat file. I know it's the mac converting the file, as the windows user sends me a file to my gmail account it's fine.
Any idea's how to fix this on the MAC?
Outlook is going to be free for Mac, however, that won't necessarily fix the issue completely. Outlook, at times, have had that issue with those files as well.