You'll probably get a lot of posts about the virtues of
mutt, but found mutt difficult to use. In particular, mutt lacks a built-in SMTP service, so you need to install and configure separate SMTP software in order to merely send email.
May I suggest a more user-friendly alternative:
elmo.
Elmo is a console email client, with a conventional Eudora/Outlook interface (mail folders on the left, headers on the right). It has built-in POP3 and SMTP support. Elmo is also
way easier to configure than mutt.
One caveat: you will need to know whether your mail is in
mbox (all your mail is kept in a single monolithic file) or
maildir format (each message is a separate text file in your Mail directory hierarchy). My mail is in maildir format, and I can verify that elmo works perfectly well with that.