Here is some Code that runs very well in Director 8
on mouseUp
set the exitLock to true
goToNetPage ("mailto:e-mail_adress"

end
on mouseleave me
set the exitLock to false
end
put this behavior to a button of your choice.
You can put some text to the subject field of the mail then you put a ?subjecttext directly after the email-adress.
Some remarks to exitLock:
I must used this because there were somw dificulties then I closed the E-Mail-Client with a keyboard shortcut. The shortcut closed not only the Client but also the Director-Show, but with exitLock ths didn´t happen.
Some remarks to Microsoft-Products:
This behavior opens Internet-Explorer, showing sort of Error-Message, and then opens Outlook. I have found no way to open Outlook directly, and must always tell my Chef "It´s not a bug it´s Microsoft"
Have fun with it [sig][/sig]