The list of recommended mail clients had nothing for mobile. Is it because good ones don't exist? I'm a happy GMail (android+webmail) user because the usabilit

The list of recommended mail clients had nothing for mobile. Is it because good ones don't exist? I'm a happy GMail (android+webmail) user because the usability is good enough and I don't need to install and configure stuff. If I wanted to send plaintext email from my Android phone, is there a reasonably easy and usable way to do it?