Why can't anyone open my email attachments (Mac related)

[Pennies]

Each time I send an email with an attachment the recipient can't access the attachment.

I've got Word on the computer (it's the Word for Mac version). I can open attachements from other people but not vice versa.

It's such a pain because I'm starting a course wherby I can submit assignments via email which would be so much quicker and easier for me and my course moderator.

[GeekBoy]

What version of Word for Mac? The shiny new 2008 version?

[peanutbear]

do you have a mac address
are you using Entourage as a mail host or
the mail with osx