Email sends email to remote SMTP servers via the
command line, which makes it useful in cron jobs.
It will send to any RFC standard remote ESMTP
server, is TLS/SSL enabled, and will allow you to
encrypt, sign, and design your message on the fly.
It has the capability to use signature files with
dynamic options, address book functionality, and
users can also attach pictures, binary files,
documents, or whatever they want. It is completely
compatible with GNUPG for encryption and signing,
and is easy to configure and use.