Avoiding Winmail.dat Issues
If you find yourself getting calls saying your attachment has come across as a "winmail.dat" file and is unreadable, here is how you correct the problem.
- Open Outlook, and then click on "tools" and then "options".
- Click on the "mail format" tab. Set your mail format to either plain text or html. Do not use "rich text". This is what causes the winmail.dat file to appear.