This chapter introduces some of the terms you'll need to know and then takes you on a tour of mh-e. [1] When you're done, you'll be able to send, read, and file mail, which is all that a lot of people ever do. But if you're the curious type, you'll read Using mh-e to be able to use all the features of mh-e. If you're the adventurous type, you'll read Customizing mh-e to make mh-e do what you want. I suggest you read this chapter first to get the big picture, and then you can read the other two as you wish.
[1] The keys mentioned in these chapters refer to the default key bindings. If you've changed the bindings, refer to the command summaries at the beginning of each major section in Using mh-e, for a mapping between default key bindings and function names.