Is it winmail.dat by any chance?
Is one of the mail servers Exchange server and the other isn't?

"TxWebdesigner" wrote in message
...
My client sends me Word documents but they have been coming through lately
with a .dat extension that doesn't seem to allow me to open them. It's
encoded or something and looks like a bunch of symbols instead of text.

Can someone tell me how to fix this?

Thank you!