With this app you make up an email address and name and send emails to who ever you'd like. For example you can pretend to be you classmate's teacher or your colleagues boss. It works very easy and is fun spoof tool. Another big advantage is that it is impossible for the receiver to see your real email address. I didn't even know that this was possible.. Very nice tool to have

https://play.google.com/store/apps/details?id=fr.neamar.spoofmail