The best thing you can do for the person to whom you are giving the iPad is to do a complete restore of the iPad.
This will put a fresh iOS version on it, remove all your data (cause you'll restore from new) and get it ready for the new person to treat it as if it is fresh from the box.
You do this via iTunes and when you are done, it's as if it's brand new AND all your data, to include email, will be wiped clean.
Marilyn