file format question

[mebhas]

i just recieved a file as an attachment from a client but i am not able to open the file. it came with a .dat extension but i cannot determine which program opens the file. the first few lines of the file is attached.

[SLH]

http://pages.prodigy.net/michael_santovec/decode.htm#ms-tnef

I think this is relevent.