Default Email Client on Windows?

[Scott Rossi]

Anyone know where to find the default email app in the Windows registry?

I'm trying to address a situation where a user may not have any mail app
installed (or simply not initialized) and I'm hoping the above entry will be
blank or provide some indication that the user has not specified any client
app.

Thanks & Regards,

Scott Rossi
Creative Director
Tactile Media, Multimedia & Design