The Mutt MUA started in 1995 when Michael Elkins wrote the first version. It's powerful, light-weight, made for CLI, and tends to suck less than do other email clients. It's my MUA of choice, and if you've never used it (or haven't in a while), you may want to give it a try. For the purposes of this little tutorial, I am going to assume that you use Gmail (who doesn't these days?). Another thing, Mutt has many more configuration options than those I will present here, I encourage you to look through the reference and explore more.