A friend wants to create a QR code that sends an e-mail with the subject line and body of the e-mail pre-drafted. Can that be done?
Yes, it's possible. You can use for example this free web service (select "email" tab).
Resurrecting this thread for anyone still interested.
The answer above is perfectly valid if you are looking at creating a specific QR code only once.
If you are looking at doing this programmatically, you might be better off using some sort of QR-encoding library for whatever programming language you use, and use the MATMSG syntax to generate this on the fly.
See the reference here: http://www.labnol.org/internet/email-with-qr-code/19610/
Specifically, the syntax is
You can also use the normal HTML mailto notation if that makes it easier for you.
I hope this helps!