Mutt

Mutt is a colored text-/console-based email application or MUA. It is similar to Pine/elm but with a fully free (GPL) license and more features. Some main features are:
 * MIME
 * Gpg and SSL/SASL encryption
 * supports mbox,maildir and MH mail formats
 * IMAP mail server support

Mutt claims to be only a MUA. Meaning that it won't directly talk to remote SMTP servers (for sending mail) or remote POP3 servers (for receiving mail). The authors consider that the job of a Mail Transport Agent. It does have the built-in ability to talk to sendmail (or similar) programs for sending mail or to retrieve mail it has a built-in ability to use IMAP servers or some other local mail format stored by some other program (e.g. fetchmail).

Configuration
IMAP mailboxes are specified with an URL starting with imap://, usually in a format like: imap://user@hostname/mailbox The prefix imaps:// is used for IMAP over an encrypted SSL connection. send-hook [!]  is executed when sending mail to an address matching my_hdr