Changing Excel to .dat format

[Guest]

I am running Windows XP and using Outlook 2002. When I attach an Excel file
to my emails the recipient gets an attachemnt that has a .dat extension. Why
is the file changing.

 

[Vince Averello [MVP-Outlook]]

First thing to do is to make sure that you're not sending your mail in Rich
Text Format. Try Plain Text or HTML instead.