Question : Email attachments come out as .dat files.

My boss is sending emails to people through outlook using exchange server, sometimes when he attaches lets say for example, an excel spreadsheet it's either not coming at the receiving end at all or it's coming out as a .dat file.

Suggestions?

Answer : Email attachments come out as .dat files.

Do you mean winmail.dat?

http://www.gpc.edu/~jbenson/resource/winmail.htm