How do I open a winmail.dat file
Someone sent me a PDF file to Outlook but it arrived on my Mac as a winmail.dat file which ai cannot open
I'm guessing hte source was Outlook and you do not Outlook that on your Mac. To view the file they will need to resend in a non-RTF format or you'll need a winmail.dat reader. The latter is possible but more of a pain. If you use full Outlook, not Outlook Express you should be able to read the attachment and it shouldn't be seen as a winmail.dat.
Interesting Reads on Topic